Baum-Holland v. Hilton El Con Management, LLC ( 2020 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 18-2061
    LAURA BAUM-HOLLAND; SARAH HOLLAND;
    EMILY HOLLAND; JOSEPH HOLLAND,
    Plaintiffs, Appellants,
    v.
    HILTON EL CON MANAGEMENT, LLC; HILTON EL CON OPERATOR, LLC;
    LXR LUXURY RESORTS, INC.; EL CONQUISTADOR PARTNERSHIP L.P.,
    S.E., d/b/a El Conquistador Resort;
    ZURICH AMERICAN INSURANCE COMPANY,
    Defendants, Appellees,
    EL CONQUISTADOR GOLF RESORT & CASINO AND LAS CASITAS RESORT,
    a Waldorf Astoria Resort; HILTON INC.; LA CASA DEL MAR, INC.;
    INSURANCE COMPANY ABC; JOHN DOE 1; JOHN DOE 2; JOHN DOE 3,
    Defendants.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF PUERTO RICO
    [Hon. Daniel R. Domínguez, U.S. District Judge]
    Before
    Torruella, Thompson, and Kayatta,
    Circuit Judges.
    Hatuey A. Infante-Castellanos, with whom Hatuey Infante Law
    Offices, P.S.C., Freddie Pérez-González, Freddie Pérez-González &
    Assoc., P.S.C., Toby B. Fullmer, and Toby B. Fullmer, L.L.C. were
    on brief, for appellants.
    Iván M. Fernández, with whom Law Office of Iván M. Fernández
    was on brief, for appellee Zurich American Insurance Company.
    Francisco E. Colón-Ramírez, with whom Colón Ramírez LLC was
    on brief, for appellees Hilton El Con Management, LLC, Hilton El
    Con Operator, LLC, and El Conquistador Partnership L.P., S.E.
    June 30, 2020
    -2-
    TORRUELLA, Circuit Judge.     This diversity case arises
    from the unfortunate death of Dr. George Holland ("Dr. Holland")
    while he was vacationing at El Conquistador Resort, a hotel located
    in Fajardo, Puerto Rico.   Dr. Holland's wife, Laura Baum-Holland
    ("Baum-Holland"),1 and their children, Sarah, Emily, and Joseph
    Holland (collectively "Appellants") asserted a tort claim under
    Article 1802 of the Puerto Rico Civil Code against El Conquistador
    Partnership L.P., S.E. d/b/a El Conquistador Resort; its insurer,
    Zurich American Insurance Company; Hilton El Con Management LLC;
    Hilton El Con Operator LLC (collectively "Defendants-Appellees");
    and LXR Luxury Resorts,2 stemming from Dr. Holland's death while
    he was snorkeling close to Palomino, an island near the hotel.3
    Defendants-Appellees   moved   for    summary   judgment,   which   the
    district court granted, dismissing the complaint.     Because we find
    that there is insufficient evidence in the record to establish the
    causation element of Appellants' tort claim, we affirm.
    1   Baum-Holland is an obstetrician and gynecologist.
    2  Although LXR Luxury Resorts is also a named defendant, it is a
    trademark that El Conquistador Partnership L.P., S.E. licenses
    from LXR Holdco, Inc., not an entity that may be sued.
    3  The operative complaint also included Casa del Mar, Inc. as a
    defendant but, as we will later explain, it is not a party on
    appeal.
    -3-
    I.   Background
    A.    Factual Background
    On December 26, 2012, Dr. Holland, Appellants, and some
    other relatives and friends arrived in Puerto Rico to celebrate a
    birthday and New Year's Eve.              They stayed at El Conquistador
    Resort,    a    luxury    hotel    located    on    the   coast   of   Fajardo,
    Puerto Rico.        At the relevant time, the hotel was owned and
    operated       by   El   Conquistador     Partnership     L.P.,   S.E.    d/b/a
    El Conquistador Resort.           El Conquistador Resort provides ferry
    transportation to a nearby island, Palomino, whose facilities are
    managed by the hotel.
    On January 1, 2013, Dr. Holland, his family, and some
    friends, including Lawrence and Lisa Jassin,4 used the hotel's
    transportation services to get to Palomino, where they planned to
    spend the day at the beach.            Dr. Holland was obese and suffered
    from untreated hypertension.
    Dr. Holland and his family rented snorkeling gear from
    Casa Del Mar, Inc. ("Casa del Mar"), a concession stand on Palomino
    Island.5    They rented four masks and four sets of fins.              Casa del
    Mar had signs indicating the availability of flotation belts.
    4    The Jassins arrived in Puerto Rico on December 31, 2012.
    5  The hotel shared in the profits as a result of its Concession
    Agreement with Casa del Mar.
    -4-
    That day, it had approximately eight to fifteen flotation belts
    that were in view to the public and available for rental for five
    dollars each.    Dr. Holland did not rent any flotation belts.            Casa
    del Mar rented two belts later in the day to other patrons.               Other
    than the flotation belts, the concession stand had no other safety
    equipment.
    Customers   renting   equipment    from   Casa   del   Mar    were
    required to read and sign a release form.         Dr. Holland signed the
    document before taking the equipment.          The document stated:
    Snorkeling Liability and Release Policy
    (Please Read Below Carefully and Sign)
    Medical History
    I neither am nor have suffered from any mental and/or
    physical disease, illness, or disability that would
    render me unfit for snorkeling.
    Release Liability
    I fully understand that my snorkeling activity is at my
    own risk, and hear by [sic] release La Casa del Mar Dive
    Center, El Conquistador Resort, the subsidiaries, and
    it's [sic] employees.    I also understand that I will
    hold them harmless from all claim, risk, damage, injury,
    and liability arising from any injury or illness
    sustained while engaged in snorkeling caused from any
    negligence or default of any other snorkelers.
    Equipment
    I hear by [sic] accept the equipment as follows: I agree
    that the use of such equipment is at my own risk. I
    shall return the equipment in good working order, the
    same way and complete as was received.
    -5-
    After renting the snorkeling equipment, Dr. Holland and
    his party set out to snorkel between Palomino and Palominito, a
    smaller   island    off   the   coast    of   Palomino.     Dr.     Holland   had
    snorkeled before.       According to Mrs. Jassin, the water was choppy,
    and there were strong currents that made them drift to the side,
    but "[they] were okay" and did not notice any conditions that would
    warrant them to change their plans and turn back to Palomino.6
    Dr. Holland was swimming next to Mrs. Jassin, about twelve feet to
    her left.    At some point during the swim, Dr. Holland directed Ben
    -- the Jassins's son -- to swim to the island ahead of him
    (Palominito) to get Dr. Holland's son, Joseph.               Ben was able to
    do   as   instructed.      Approximately       halfway    through    his   swim,
    Dr. Holland stopped swimming and stared at Palominito.                  At that
    time, according to Mrs. Jassin, Dr. Holland was treading water,
    not thrashing, and appeared calm.               He did not appear to be
    drowning.    Mrs. Jassin asked Dr. Holland if he was okay, but he
    did not respond.
    After    noticing     his     unresponsiveness,       the   Jassins
    approached Dr. Holland.         Mrs. Jassin had lifeguard training, and
    was trained in cardiopulmonary resuscitation ("CPR") and the use
    6  Mrs. Jassin agreed that "there certainly wasn't anything in the
    water that was overcoming any swimmer and causing them to go under"
    and "[n]o one was getting tossed in the waves or getting thrown
    under water, like crashing waves."
    -6-
    of   automated    external   defibrillators      ("AED").    Shortly    after
    Mrs. Jassin reached him, Dr. Holland began to foam at the mouth
    and slumped in the water.          The Jassins held Dr. Holland, which
    prevented his head from going under water, and yelled for help.
    Mrs. Jassin believed that Dr. Holland was having a heart attack.
    Within five minutes, Edward Valentín, an employee of
    Palomino Water Sports,7 arrived on a jet ski to aid Dr. Holland.
    Mr. Valentín had previously worked in search and rescue missions
    with the State Emergency Management Service in Puerto Rico and was
    trained in life rescue techniques.            Mr. Valentín signaled to the
    shore for more assistance.        At that point, John Rosado, co-owner
    of Palomino Water Sports, and José Caraballo, another of his
    employees who is also a certified lifeguard, got on a jet ski and
    headed towards Dr. Holland.            The group tried to get Dr. Holland
    on the jet ski to no avail.            At some point during their attempt,
    Dr. Holland's head submerged.8
    Then, a Hobie Cat arrived with people from Dr. Holland's
    group, 9 and     Dr.   Holland   was    placed   on   it.   Once   on   board,
    7  Palomino Water Sports is another concession stand that rents
    jet skis, kayaks, paddle boards, sailboats, Hobie Cats (small
    sailing catamarans), beach toys, and other water sport equipment.
    8  This was the first time that anyone saw Dr. Holland's head go
    under water.
    9    Baum-Holland's sister-in-law and nephew, as well as Joseph
    -7-
    Baum-Holland's sister-in-law, who is a physician, performed CPR on
    Dr. Holland.10        Baum-Holland's brother, Dr. Richard Baum,11 who had
    heard that Dr. Holland was in trouble, approached the Hobie Cat on
    a jet ski and got on board.              Once on board, he also helped with
    the CPR, which was provided to Dr. Holland continuously until the
    Hobie Cat arrived at the shore of Palomino within two to ten
    minutes.12      According to Dr. Baum, Dr. Holland's pulse remained
    faint    and    his   breathing       shallow   until    he   was    taken    back   to
    Palomino, where Dr. Holland's respiration and pulse at some point
    could no longer be detected.
    Once back at Palomino, Dr. Holland was laid on the sand
    and    continued      to    receive    CPR.     Other    hotel      guests   assisted
    Dr. Holland.          Dr.    Melinda     Armacost   --    a    dentist       with    CPR
    certification -- and an ER nurse began chest compressions and mouth
    to mouth respiration.           While receiving CPR, Dr. Holland expelled
    liquid (water and "some kind of chunk content").                     Dr. John Ruge,
    Holland were on the Hobie Cat.
    10  Baum-Holland's  sister-in-law,               Dr.     Kathe       Baum,     is     an
    interventional radiologist.
    11    Dr. Richard Baum is also an interventional radiologist.
    12 While Mr. Rosado testified that it took the Hobie Cat between
    two to three minutes to get to the shore, Mrs. Jassin testified
    that "[i]t seemed like forever[,] . . . maybe ten minutes, but it
    seemed like a long time because [they] were worried about
    [Dr. Holland]."
    -8-
    a neurosurgeon with twenty-seven years of experience, joined the
    group in aiding Dr. Holland shortly thereafter and performed CPR.
    Both Dr. Armacost and Dr. Ruge stated that, while lying on the
    sand, Dr. Holland was "blue," "cyanotic," "pulseless, breathless,
    [and] unresponsive."13
    A hotel employee brought an AED to the scene 14 and
    Dr. Ruge applied it on Dr. Holland,15 but the AED did not register
    a    pulse   from   Dr.    Holland. 16    Dr.   Ruge   also   administered   an
    epinephrine injection (EpiPen) to Dr. Holland's heart.
    Dr. Holland was then placed on a stretcher and driven to
    the dock on a golf cart.         Dr. Ruge stayed with Dr. Holland on his
    way to the dock.          Once at the dock, Dr. Holland was transported
    back to Fajardo on a U.S. Department of Homeland Security boat.17
    13  Dr. Ruge thought Dr. Holland was already dead when he first
    saw him.
    14   The employee also brought a small oxygen tank with a mask.
    15 Dr. Armacost testified that it took around ten minutes to get
    the AED to Dr. Holland's location. Baum-Holland testified that
    it took a "long time," although she does not claim that it took
    more than ten minutes. This discrepancy, however, does not create
    an issue of material fact.
    16   Dr. Armacost did not detect a pulse on Dr. Holland either.
    17  According to Mr. Rosado, Dr. Holland was transported back to
    Fajardo on a Homeland Security boat instead of on the hotel ferry
    because the former was faster than the latter.      Approximately
    thirty-five to forty minutes transpired between the time
    Dr. Holland returned to Palomino on the Hobie Cat and when he was
    -9-
    He continued to receive CPR during the trip back to Fajardo, where
    an ambulance was awaiting on shore.               Dr. Holland was taken to a
    hospital in Fajardo, where he was pronounced dead upon arrival.
    Dr. Francisco Cortés, a forensic pathologist who worked
    with the Puerto Rico Institute of Forensic Sciences, performed
    Dr. Holland's autopsy and prepared an autopsy report.                      The report
    noted that Dr. Holland was 5'10", was "obese," had an enlarged
    heart, enlarged and fatty liver, atherosclerosis, and presented
    pulmonary and sphenoid edema.                The report listed Dr. Holland's
    cause      of      death        as    "[a]sphyxia       by        drowning"     with
    "[a]rteriosclerotic coronary disease" as a "contributing factor."
    During      his     deposition,     Dr.    Cortés      explained       the
    information that was available to him at the time of the autopsy,
    the   autopsy     process,      and   his   findings.        He   stated    that,   on
    January 2, 2013, an employee from the Puerto Rico Institute of
    Forensic        Sciences       interviewed     Baum-Holland,        who      provided
    information about Dr. Holland's medical history.                   According to the
    transcript       of     that    interview,      Baum-Holland        reported     that
    Dr. Holland       had    high    cholesterol     levels      and    suffered     from
    hypertension but was not treated for either of these conditions.
    placed on the Homeland Security boat.
    -10-
    Dr.   Cortés     further      explained    that    he   performed
    Dr. Holland's autopsy on January 4, 2013.               That day, Dr. Cortés
    filled out a form for histology testing of heart, lung, and liver
    tissue from Dr. Holland.        In the "comment" section of that form,
    Dr. Cortés wrote, "[w]hile he was snorkeling at the beach, he
    suffered an infarct and died."          According to Dr. Cortés, in writing
    that statement, he "took into consideration that [Dr. Holland] was
    snorkeling, . . . was obese, and . . . had untreated hypertension."
    Similarly,    in   a   form   he    submitted    requesting     toxicological
    analysis of Dr. Holland's "blood; nasal swab; and diffused humor,"
    Dr. Cortés identified Dr. Holland's "manner of death" as "pending"
    and his "class" of death as "cardiac."                  In this same form,
    Dr. Cortés wrote in the "circumstances of death" section that
    "[w]hile [Dr. Holland] was snorkeling at the beach, he had an
    infarct and died."
    During his deposition, Dr. Cortés also expanded on his
    findings from the autopsy report.            He testified that "coloration
    on [Dr. Holland's] face" "could be indicative of arrhythmia" or
    "postmortem    changes."       He   also    testified    that   fluid   in   the
    sphenoid sinus, such as that found during Dr. Holland's autopsy,
    is typically found in people who have drowned, and that Dr. Holland
    had to have been alive when the liquid entered his sphenoid sinuses
    in order for him to have "breathe[d]" in the water.
    -11-
    In addition, Dr. Cortés explained that the "congested
    mucosa" found in Dr. Holland's "epiglottis, trachea and larynx,"
    was "evidence of a lack of oxygenation," which can be found in
    different infarct cases as well as some drowning cases.              He also
    testified that "pulmonary edema" and "foaming at the mouth," both
    exhibited by Dr. Holland, can be found in a person who has suffered
    a heart failure or someone who has drowned.
    Dr. Cortés also testified that Dr. Holland's "spleen
    [was] increased in size," his lungs were "very increased in
    weight," and he had a "markedly enlarged" and "fatty liver."
    In explaining the autopsy report's finding regarding
    Dr. Holland's    heart,    Dr.   Cortés    testified   that   Dr.   Holland's
    untreated "chronic hypertension" led him to have a "considerably"
    larger than normal heart (weighting 560 grams), which could cause
    arrhythmias.    The heart also had "thickening of the left [blood]
    ventricle" and "atherosclerotic changes."              In sum, Dr. Cortés
    characterized Dr. Holland's heart as a "sick heart."
    Lastly, although in the autopsy report Dr. Cortés listed
    "drowning"      as   Dr.     Holland's       "cause     of     death"     and
    "[a]rteriosclerotic coronary disease" as a contributing factor,
    Dr. Cortés clarified in his deposition that, "by drawing the
    conclusion of drowning, [he] did not rule out a heart attack"
    "preceding the aspiration of the fluid in the sinus."               In fact,
    -12-
    when asked to comment on the opinion from a cardiologist consulted
    by El Conquistador to the effect that Dr. Holland suffered a heart
    attack   prior   to   aspirating   water   and   drowning, 18 Dr.   Cortés
    responded that he could not "rule that out, because that's probably
    what happened."
    Appellants hired Dr. Miguel Canals as an expert in
    oceanography.     Dr. Canals wrote a report on the oceanographic
    conditions on January 1st and was then deposed.
    At his deposition, Dr. Canals acknowledged that, on the
    morning of January 1, 2013, the National Weather Service ("NWS")
    issued a bulletin stating that "dangerous surf zone conditions"
    were expected for Puerto Rico and the Northern U.S. Virgin Islands.
    Dr. Canals testified that, although the NWS estimated that waves
    18  Specifically, Dr. Cortés was told that the cardiologist's
    opinion was as follows:
    [Dr. Holland] had a severe left ventricular
    hypertrophy 2.4 centimeters, normal being less than one
    centimeter. He went into heart failure most likely due
    to elevating his heart rate and blood pressure from
    snorkeling, and then developed diastolic dysfunction of
    the heart muscle, leading to pulmonary edema.
    Pulmonary edema, and foaming at the mouth,
    developed before he was lifted onto the catamaran, and
    before [the Jassins] saw any evidence of Dr. Holland's
    submerging below the water.
    Going into pulmonary edema certainly could affect
    his responsiveness and cause an ischemic response. With
    ischemia, or lack of blood and oxygen, he then developed
    a fatal arrhythmia and died.
    Hypertension, severe left ventricular hypertrophy,
    and exercise such as snorkeling explained his death.
    -13-
    were breaking in the Atlantic Ocean between ten and fourteen feet
    on    January     1,   2013,   his   reconstruction       of   the     oceanographic
    conditions for the area where Dr. Holland was snorkeling indicated
    that the waves between Palomino and Palominito were breaking at
    only one to two feet.          Dr. Canals explained that this discrepancy
    was due to the Palomino area being a "sheltered environment"
    surrounded by reefs and islands to the north of Palomino that
    dissipate wave energy.          He found that the conditions in the area
    where Dr. Holland was snorkeling were "drastically different" from
    the    conditions      described     in    the     NWS   bulletin      because   "the
    [bulletin] does not attempt to estimate the wave conditions at
    locations which are not exposed."                The bulletin, in Dr. Canals's
    opinion, "is meant for all of Puerto Rico" and does not analyze or
    attempt to forecast the conditions at the exact location where
    Dr. Holland was snorkeling.           Dr. Canals determined that the winds
    in the area where Dr. Holland was snorkeling should have been
    between five and twelve miles per hour, and that the current speeds
    near Palomino were somewhere between 0.6 to 0.9 knots.
    B.    Procedural History
    On    November    28,   2014,       Appellants    filed    the   initial
    complaint.      They amended their complaint three times, the last of
    which they filed on January 9, 2017.                     On December 15, 2017,
    Defendants-Appellees moved for summary judgment.                     On January 22,
    -14-
    2018, Appellants opposed summary judgment.             Defendants-Appellees
    replied on February 10, 2018.19
    On September 30, 2018, the district court issued an
    opinion    and   order    granting    Defendants-Appellees'       motion   for
    summary    judgment      in   its    entirety.       See    Baum-Holland    v.
    El Conquistador P'ship, 
    336 F. Supp. 3d 6
    (D.P.R. 2018).               As an
    initial matter, the district court found that Hilton El Con
    Management LLC and Hilton El Con Operator LLC did not own, operate,
    or provide services to the hotel during the relevant time period.
    It also found that LXR Luxury Resorts is not an entity, but rather
    a    trademark   owned   by   LXR   Holdco,   Inc.   that   El   Conquistador
    Partnership L.P., S.E. used as a licensee; and that in any event,
    LXR Luxury Resorts did not own, operate, or provide services to
    the hotel during the relevant time period.                 Appellants do not
    challenge those findings or otherwise argue that summary judgment
    should not have been entered as to those specific defendants.
    Accordingly, Appellants have waived any challenge to the dismissal
    of the complaint as to those defendants.              See United States v.
    Zannino, 
    895 F.2d 1
    , 17 (1st Cir. 1990).             Our analysis on appeal
    19 Casa del Mar also filed a motion for summary judgment, which
    Appellants opposed.    Soon thereafter, and before the district
    court could rule on Casa del Mar's motion, Appellants settled all
    their claims against Casa del Mar and the district court entered
    partial judgment dismissing all claims against it. Casa del Mar
    is not a party on appeal.
    -15-
    is thus limited to Appellants' claims against El Conquistador
    Partnership     L.P.,   S.E.    d/b/a    El    Conquistador   Resort   and   its
    insurance company, Zurich American Insurance Company (collectively
    "El Conquistador").
    The district court granted summary judgment in favor of
    El Conquistador on the grounds that Appellants had failed to meet
    their burden of proof as to the breach of a duty of care and
    causation elements of their negligence claim.              The court rejected
    Appellants' arguments that El Conquistador breached its duty of
    care to Dr. Holland by failing to warn him of the allegedly
    dangerous sea conditions, by not providing timely and appropriate
    aid, and by failing to provide safety devices such as flotation
    belts or vests, reflective mirrors, and whistles.
    As to the alleged failure to warn, the court held that
    Appellants did not "establish a real hazardous condition at sea"
    about   which   El   Conquistador       should   have   warned   Dr.   Holland.
    Specifically, the court found that the NWS bulletin on which
    Appellants relied was not probative of their claim because the
    evidence in the record showed that the conditions in the bulletin
    were not consistent with the conditions in the specific area where
    Dr. Holland was swimming (the stretch of water between Palomino
    and Palominito), which is a "sheltered environment" due to "a
    barrier   of    islands   and    reefs."         Because   foreseeability     is
    -16-
    necessary to establish that a defendant breached its duty of care,
    the   court     concluded    that   Appellants'     "fail[ure]    to    provide
    evidence that made foreseeable that Dr. Holland's event was bound
    to occur" defeated their contention that El Conquistador had
    breached its duty by failing to warn Dr. Holland.                     The court
    further determined that Dr. Holland knowingly endangered himself
    and assumed the risk when he decided to snorkel despite having
    knowledge of his health conditions.
    Regarding the alleged breach of a duty of care by failing
    to provide safety devices such as flotation belts, reflective
    mirrors, or whistles, the court concluded that Appellants had
    failed to establish that El Conquistador had a duty to provide
    such safety devices.         Furthermore, the court found that although
    flotation     belts   were   available     for   rental   at   Casa    del   Mar,
    Dr. Holland chose not to rent one.
    In rejecting Appellants' argument that El Conquistador
    breached its duty of care to Dr. Holland by failing to provide
    timely and appropriate aid, the court found that the immediate aid
    provided by Mrs. Jassin, who had lifeguard and CPR training and
    who was only twelve feet away from Dr. Holland, was "much more
    effective"     than   any    help   that   could   have   been   provided      by
    El Conquistador or an on-duty lifeguard given that Dr. Holland was
    approximately 250 meters from the shore when the incident occurred.
    -17-
    Furthermore,    the     court    found       that   Dr.   Holland    continuously
    received CPR, and that El Conquistador had an AED available, which
    a doctor with twenty-seven years of experience used to try to save
    him.
    As to the element of causation, the district court held
    that Appellants had failed to establish causation because they did
    not submit evidence from which a reasonable jury could conclude
    that "Dr. Holland would have survived if first aid [had been]
    provided by El Conquistador instead of Mrs. Jassin."                 Furthermore,
    the court noted that Dr. Holland received CPR from various doctors,
    that an AED was also used on him by a doctor, and that Appellants
    had failed to present evidence that these "efforts were deficient."
    Finally, the district court determined that the release
    form that Dr. Holland signed when he rented the snorkeling gear
    from Casa del Mar was enforceable and "released El Conquistador
    from liability regarding the snorkeling activity [Dr. Holland] was
    engaging   in   prior    to     his    demise."       Accordingly,     the   court
    concluded that the release barred Appellants' claims.
    Appellants timely appealed. They challenge the dismissal
    of their Article 1802 tort claim on the merits as well as the
    district   court's      finding       that    the   release   form    signed   by
    Dr. Holland barred their tort claim.
    -18-
    II.   Discussion
    A.   Standard of Review
    We review a district court's grant of summary judgment
    de novo, construing the record in the light most favorable to the
    nonmovant and resolving all reasonable inferences in that party's
    favor.    Ocasio-Hernández v. Fortuño-Burset, 
    777 F.3d 1
    , 4 (1st
    Cir. 2015); Mesnick v. Gen. Elec. Co., 
    950 F.2d 816
    , 822 (1st Cir.
    1991) (quoting Griggs-Ryan v. Smith, 
    904 F.2d 112
    , 115 (1st Cir.
    1990)).   Summary judgment is appropriate when the moving party
    shows that "there is no genuine dispute as to any material fact
    and the movant is entitled to judgment as a matter of law."    Fed.
    R. Civ. P. 56(a).   A genuine dispute is "one that must be decided
    at trial because the evidence, viewed in the light most flattering
    to the nonmovant, would permit a rational factfinder to resolve
    the issue in favor of either party."   Medina-Muñoz v. R.J. Reynolds
    Tobacco Co., 
    896 F.2d 5
    , 8 (1st Cir. 1990) (citations omitted).
    "Facts are material when they have the 'potential to affect the
    outcome of the suit under the applicable law.'"    Cherkaoui v. City
    of Quincy, 
    877 F.3d 14
    , 23 (1st Cir. 2017) (quoting Sánchez v.
    Alvarado, 
    101 F.3d 223
    , 227 (1st Cir. 1996)).     The party opposing
    summary judgment "bears 'the burden of producing specific facts
    sufficient to deflect the swing of the summary judgment scythe.'"
    Theidon v. Harvard Univ., 
    948 F.3d 477
    , 494 (1st Cir. 2020)
    -19-
    (quoting Mulvihill v. Top-Flite Golf Co., 
    335 F.3d 15
    , 19 (1st
    Cir. 2003)).     "For this purpose, [it] cannot rely on 'conclusory
    allegations, improbable inferences, acrimonious invective, or rank
    speculation.'"
    Id. (quoting Ahern
    v. Shinseki, 
    629 F.3d 49
    , 54
    (1st Cir. 2010)).
    B.    Applicable Law
    Because this is a diversity case, we apply Puerto Rico's
    substantive law.       See Suero-Algarín v. CMT Hosp. HIMA San Pablo
    Caguas, 
    957 F.3d 30
    , 39 (1st Cir. 2020) ("[F]ederal courts sitting
    in diversity apply state substantive law." (quoting Gasperini v.
    Ctr. for Humanities, Inc., 
    518 U.S. 415
    , 427 (1996))).            Appellants
    filed their suit under Article 1802 of the Puerto Rico Civil Code
    -- Puerto Rico's general tort statute.        Article 1802 provides that
    "[a] person who by an act or omission causes damage to another
    through fault or negligence shall be obliged to repair the damage
    so done."    P.R. Laws Ann. tit. 31, § 5141.             It further provides
    that "[c]oncurrent imprudence of the party aggrieved does not
    exempt from liability, but entails a reduction of the indemnity."
    Id. "Negligence under
    Article 1802 is generally defined as
    'the   failure   to    exercise   due   diligence   to    avoid   foreseeable
    risks.'"    Blomquist v. Horned Dorset Primavera, Inc., 
    925 F.3d 541
    , 546-47 (1st Cir. 2019) (quoting Woods-Leber v. Hyatt Hotels
    -20-
    of P.R., Inc., 
    124 F.3d 47
    , 50 (1st Cir. 1997)).    To recover on a
    negligence-based tort claim pursuant to Article 1802, a plaintiff
    must establish: "(1) a duty requiring the defendant to conform to
    a certain standard of conduct, (2) a breach of that duty, (3) proof
    of damage,[20] and (4) a causal connection between the damage and
    the tortious conduct."
    Id. at 547
    (quoting 
    Woods-Leber, 124 F.3d at 50
    ).   Because the parties do not dispute that Appellants meet
    the third element of their Article 1802 claim, we focus on the
    remaining elements.
    The first element, a "duty requiring the defendant to
    conform to a certain standard of conduct," is commonly known as a
    "duty of care."   It refers to an "obligation to anticipate and
    take measures against a danger that is reasonably foreseeable."
    Woods-Leber v. Hyatt Hotels of P.R., Inc., 
    951 F. Supp. 1028
    , 1036
    (D.P.R. 1996), aff'd, Woods-Leber, 
    124 F.3d 47
    .    This duty of care
    may arise: (1) by statute or regulation; (2) "as the result of a
    special relationship between the parties that has arisen through
    20  Some cases refer to this element as requiring proof of an
    "injury." See, e.g., Vázquez-Filippetti v. Banco Popular de P.R.,
    
    504 F.3d 43
    , 49 (1st Cir. 2007); Irvine v. Murad Skin Research
    Labs., Inc., 
    194 F.3d 313
    , 321 (1st Cir. 1999) (using
    "injuries/damages" interchangeably).   The discrepancy is due to
    varying translations from Spanish of the word "daño" -- derived
    from the Spanish phrase, "[e]l que . . . causa daño a otro,"
    included in the Spanish version of P.R. Laws Ann. tit. 31, § 5141.
    See 31 L.P.R.A. § 5141 (Spanish version).
    -21-
    custom; or (3) as the result of a traditionally recognized duty of
    care particular to the situation."           De Jesús-Adorno v. Browning
    Ferris Indus. of P.R., Inc., 
    160 F.3d 839
    , 842 (1st Cir. 1998).
    We have held that, under Puerto Rico law, hotels have a
    "heightened duty of care towards their guests."              
    Blomquist, 925 F.3d at 547
    .     In carrying out this duty of care, the hotel must
    act as a "prudent and reasonable person under the circumstances."
    Id. (quoting Vázquez-Filippetti
    v. Banco Popular de P.R., 
    504 F.3d 43
    , 49 (1st Cir. 2007)). However, hotels "are not absolute insurers
    of their guests' well-being."
    Id. Rather, "even
    where [the hotel
    has] a duty of care, the [c]ourt must still determine what degree
    of care is required by considering the foreseeability of an injury,
    the nature and magnitude of the injury, and what a reasonable and
    prudent man would ha[ve] done under the same circumstances."
    
    Woods-Leber, 951 F. Supp. at 1036
    .
    Regarding the second element -- breach of a duty of
    care -- because "a defendant only breaches [its] duty if [it] acted
    (or failed to act) in a way that a reasonably prudent person would
    foresee as creating undue risk," 
    Vázquez-Filippetti, 504 F.3d at 49
    ,   the   plaintiff   needs   to   demonstrate    that    the   injury   was
    "reasonably    foreseeable,"     
    Woods-Leber, 124 F.3d at 50
    -51.
    See Irvine v. Murad Skin Research Labs., Inc., 
    194 F.3d 313
    , 321-
    22 (1st Cir. 1999) (noting that "[n]ot all actions or omissions
    -22-
    which result in injuries/damages will give rise to liability under
    [A]rt. 1802"; rather, "liability will only arise if the damages
    complained of were reasonably foreseeable to the defendant").
    This inquiry is "case-specific and fact-dependent."                  
    Blomquist, 925 F.3d at 548
    .
    Although   "the       requirement    of   foreseeability         is    not
    limited   to   requiring    that    the    precise   risk    or   consequences"
    suffered by the plaintiff be foreseen, those damages "must [still]
    fall within the general class of consequences that in a normal
    person's experience flow from such an act or omission."                     Woods-
    
    Leber, 951 F. Supp. at 1036
    (emphasis omitted) (quoting Pabón-
    Escabí v. Axtmayer, 
    90 P.R. Dec. 20
    , 25 (1964), then citing Brau
    del Toro, 1 Daños y Perjuicios Extracontractuales [Torts] 184–
    185).
    Under the fourth element of an Article 1802 claim, a
    plaintiff must prove that the defendant's breach of its duty of
    care was the proximate cause of the damage or injury suffered.
    This causation analysis requires that two elements be met: (1) the
    defendant's breach of its duty of care must be the actual cause of
    the injury suffered by the plaintiff, and (2) the injury suffered
    must    have   been   reasonably         foreseeable    to    the     defendant.
    See 
    Vázquez-Filippetti, 504 F.3d at 49
    n.6 (explaining how "[a]
    defendant's    actions     may    only    be   the   proximate      cause    of    a
    -23-
    plaintiff's injuries if they in fact caused the injuries and the
    defendant could have reasonably foreseen that the injuries (or
    related harms) would result from his actions"); Tormos–Arroyo v.
    Dep't of Educ. of P.R., 
    140 P.R. Dec. 265
    , 275-76 (1996) (noting
    that for purposes of Article 1802, there is a causal relationship
    between an omission and an injury when the injury was reasonably
    foreseeable and could have been avoided had the defendant performed
    the omitted act).     Foreseeability, in the context of causation,
    cannot "be established through the simple fact that an accident
    occurred."      
    Vázquez-Filippetti, 504 F.3d at 53
    .    Instead, the
    foreseeability inquiry in this context is one of "probabilities,"
    and not mere "possibilities."     See
    id. at 54.
         An intervening
    cause, defined as "a cause of injury that 'comes into active
    operation in producing the result after the actor's negligent act
    or omission has occurred,'" Widow of Andino v. P.R. Water Res.
    Auth., 
    93 P.R.R. 168
    , 178 (1966), can break the chain of causality
    if it is deemed to have been unforeseeable by the defendant.
    See Malavé-Félix v. Volvo Car Corp., 
    946 F.2d 967
    , 972 (1st Cir.
    1991).
    C.   Analysis
    To survive summary judgment, Appellants need to point to
    sufficient evidence in the record from which a reasonable jury
    -24-
    could rule in their favor as to each of the four elements of their
    Article 1802 claim.
    Appellants argue that El Conquistador breached three
    different duties of care, which caused Dr. Holland's death by
    drowning because of the ocean conditions on January 1, 2013, and
    that   there   are   several    material     facts    in   dispute   as   to
    El Conquistador's    breach    of   those   duties,   which   make   summary
    judgment inappropriate.
    First, Appellants argue that El Conquistador had a duty
    to warn Dr. Holland about the ocean conditions on January 1st, and
    that it breached that duty by allowing him to go in the water when,
    instead, it "should have prohibited . . . Dr. Holland from engaging
    in snorkeling or other water activities."         To support that claim,
    Appellants rely primarily on the NWS bulletin and Dr. Canals's
    expert report and deposition testimony.         According to Appellants,
    there are material facts in dispute about the ocean conditions,
    including the dangerousness of the currents, which bar summary
    judgment.
    Second, Appellants posit that El Conquistador had a duty
    to aid Dr. Holland in such a moment of peril, and that it breached
    this duty by not having: "a lifeguard on duty," the means to
    quickly transport Dr. Holland to shore when he appeared to be in
    distress, or an AED readily available when Dr. Holland was brought
    -25-
    ashore to Palomino.        Appellants further argue that Dr. Holland
    received assistance and CPR from "Good Samaritan hotel guests"
    rather than from hotel staff.        According to Appellants, disputes
    over   whether   El   Conquistador    provided     effective   and   timely
    assistance to Dr. Holland -- including whether Mrs. Jassin properly
    substituted for an on-staff lifeguard -- ought to prevent the entry
    of summary judgment.
    Third, Appellants argue that El Conquistador also had a
    duty to provide safety gear, such as "flotation devices" (i.e.,
    flotation belts and snorkeling vests), whistles, and reflective
    mirrors.    According to Appellants, the parties dispute whether
    El Conquistador breached this duty, specifically whether Casa del
    Mar had "flotation devices available" on January 1st and whether
    Dr. Holland "decided not to rent them."
    In response, El Conquistador disputes that it either had
    any of these three duties of care or that it breached them.
    Furthermore, El Conquistador argues that, even assuming it had
    these duties of care and that Appellants could prove breach,
    summary    judgment   is    nevertheless   still    appropriate      because
    Appellants cannot prove causation.
    Regarding the alleged duty to warn, El Conquistador
    first disputes the admissibility of both the NWS bulletin and
    Dr. Canals's expert report.      It argues that the NWS bulletin was
    -26-
    not properly authenticated and that Dr. Canals's expert report was
    "unsworn"; and therefore, both constitute inadmissible hearsay
    evidence, which cannot be used to support Appellants' claim that
    El   Conquistador       breached   an     alleged    duty   to   warn.      In   the
    alternative, El Conquistador argues that, even if admissible,
    neither the NWS bulletin nor Dr. Canals's expert report support
    Appellants' contention that it had a duty to warn Dr. Holland of
    dangerous ocean conditions or that it breached such a duty.
    Specifically, El Conquistador argues that the NWS bulletin is not
    evidence that it was "put [] on notice" of dangerous conditions in
    the area where Dr. Holland was snorkeling, between Palomino and
    Palominito,    because,      as    admitted    by    Appellants'     own    expert,
    Dr. Canals,    the      bulletin    applied    to    a   "completely     different
    location[]."      Appellees' Brief at 38.           It argues that the evidence
    in the record (including Dr. Canals's expert report and his
    deposition testimony) shows that the conditions in the area between
    Palomino and Palominito were, in Dr. Canals's words, "drastically
    different" than those reported in the bulletin because that area
    is   surrounded    by    islands    and    reefs     that   create   a   sheltered
    environment that reduces wave energy.                 It further argues that,
    according to the evidence in the record, there were only "one to
    two-foot waves" in the area where Dr. Holland was snorkeling, and
    the winds were blowing at typical trade wind speeds.                       Finally,
    -27-
    El Conquistador posits that both the duty-of-care and breach-of-
    duty elements require that the danger alleged by the plaintiff be
    reasonably    foreseeable,   but   here,   a   drowning   event   was   not
    foreseeable because it was not likely to occur.            In support of
    that contention, El Conquistador argues that over one million
    El Conquistador guests visited Palomino between 2008 and 2012 and
    none of them drowned.
    Concerning the alleged duty to aid, El Conquistador
    argues that Appellants have failed to prove that it had a "legal
    duty to provide lifeguards" or "rescue boats at Palomino," and
    that El Conquistador provided Dr. Holland with an AED within
    "several minutes" of the incident, and an experienced neurosurgeon
    used the device on Dr. Holland.
    El Conquistador also refutes Appellants' contention that
    it breached a duty to provide safety gear.       First, it denies having
    such a duty, arguing that no "rule, law, regulation or standard"
    requires that it provide either flotation devices or "distress
    signaling devices" such as reflective mirrors or whistles.              In
    support of its contention, El Conquistador points to the deposition
    testimony of Appellants' "own liability expert," Alberto Martí, a
    certified scuba diver who owns a concession stand that rents out
    snorkeling gear in San Juan, Puerto Rico.           Mr. Martí testified
    that the use of flotation devices for snorkeling is optional and
    -28-
    people   often   do   not   rent   them,    and    that   nothing   requires   a
    concession stand that rents snorkeling equipment to provide a
    reflective mirror or a whistle to alert others in the event of
    distress.    Second, El Conquistador argues that, even assuming it
    had a duty to provide flotation devices to snorkelers, it did not
    breach that duty because Casa del Mar had between eight and fifteen
    flotation belts available for rental when Dr. Holland got his
    snorkeling equipment on January 1st.              El Conquistador emphasizes
    that, although aware that he could rent a flotation belt for only
    five dollars, Dr. Holland still opted not to rent one.
    Lastly, El Conquistador argues that Appellants cannot
    prove the causation element required to survive summary judgment.
    According to El Conquistador, Appellants have not pointed to any
    evidence in the record establishing that "Dr. Holland more likely
    than not perished because [El Conquistador] breached any standard
    of care."     It argues that the evidence shows that Dr. Holland
    "probably" died because of a cardiorespiratory event that occurred
    while he was in the water, due to an untreated heart condition.
    Following this reasoning, El Conquistador insists that Dr. Holland
    would have died due to his underlying health conditions even if he
    had been wearing a flotation device because the evidence shows
    that Dr. Holland started foaming at the mouth even before his head
    ever submerged.       El Conquistador further argues that there is no
    -29-
    proximate causation between El Conquistador's alleged breach of
    the duty to aid and Dr. Holland's death because third parties
    trained in the medical field and in life-saving techniques were
    indisputably available "quickly" to aid Dr. Holland as soon as he
    became unresponsive, to transport him to Palomino, and to provide
    CPR and other assistance, yet, witnesses testified that he either
    was already dead or died shortly after being brought ashore.
    According to El Conquistador, this shows that having a rescue boat
    or an on-duty lifeguard available would not have altered the
    outcome and that no evidence in the record suggests otherwise.    It
    further argues that Appellants have offered no evidence to show
    that, "more likely than not," providing an AED sooner would have
    saved Dr. Holland's life.
    To survive summary judgment, Appellants need to point to
    sufficient evidence in the record that would allow a reasonable
    jury to rule in their favor as to each of the four elements of an
    Article 1802 claim.      The parties do not dispute that the third
    element is met: a damage or injury.     Yet, as discussed above, the
    parties vehemently dispute the first two elements, whether El
    Conquistador had any one of the three alleged duties of care, and
    if it did, whether it breached them, as well as the fourth element,
    causation.
    -30-
    "[W]hether a duty exists is typically a legal question
    for the court."      Candelario del Moral v. UBS Fin. Servs. Inc. of
    P.R., 
    699 F.3d 93
    , 100 (1st Cir. 2012) (citing Restatement (Second)
    of Torts § 328B (noting that the court decides both "whether [the]
    facts give rise to any legal duty on the part of the defendant"
    and "the standard of conduct required of the defendant by his legal
    duty")).     Breach of duty, however, "involv[es] fluid concepts like
    reasonableness and foreseeability" and thus "is usually an issue
    for a factfinder."
    Id. "An exception
    exists where a reasonable
    jury could only decide the breach-of-duty issue one way, in which
    case a judge can resolve the matter on summary judgment."
    Id. Here, we
       need   not   decide   whether   under   Puerto   Rico   law
    El Conquistador had the duties of care alleged by Appellants or,
    if it indeed had those duties, whether there are genuine issues of
    material facts regarding the alleged breach of those duties that
    should be resolved at trial.        That is so because, even assuming
    that both issues are resolved in Appellants' favor, Appellants
    have not pointed to evidence in the record from which a reasonable
    jury could rule in their favor as to the causation element.
    First, regarding the duty to aid and to provide safety
    devices, we have carefully examined the extensive record and have
    found no evidence from which a reasonable jury could conclude that
    -31-
    if El Conquistador had provided an on-duty lifeguard, 21 hotel
    transportation to bring Dr. Holland back to Palomino when he became
    unresponsive   while   in   the   water,   22   whistles   and   reflective
    mirrors,23 and snorkeling vests (as opposed to flotation vests,
    which undisputably were available to rent for five dollars),24 it
    is more likely than not that Dr. Holland would have survived.          Nor
    have we found evidence in the record from which a reasonable jury
    could find that it is more likely than not that Dr. Holland would
    have survived if the hotel employees had brought the AED to
    Dr. Holland sooner, see Room v. Caribe Hilton Hotel, 
    659 F.2d 5
    21 Remember that Dr. Holland was first aided by Mrs. Jassin, who
    was only twelve feet away from Dr. Holland at the time of the
    incident, and who was a certified lifeguard trained in CPR and AED
    techniques.
    22 Instead of being transported in the Hobie Cat, which was sailed
    by members of Dr. Holland's party.
    23  Undisputed evidence shows that Mrs. Jassin was swimming
    approximately twelve feet away from Dr. Holland when she noticed
    that he was treading water and became unresponsive. There is no
    evidence that Dr. Holland yelled for help or otherwise seemed in
    distress or that he would have used reflective devices or whistles.
    Nor is there evidence suggesting that these devices would have
    resulted in a faster response.
    24 Although Appellants argue in a conclusory manner that there is
    a dispute regarding whether flotation belts were indeed available
    for rental, they have not pointed to anything in the record to
    dispute El Conquistador's well-supported statement that Casa del
    Mar had approximately eight to fifteen flotation belts available
    for rental when Dr. Holland got his snorkeling equipment and that
    two of those belts were rented later in the day to other patrons.
    -32-
    (1st Cir. 1981) (requiring affirmative evidence that a delay to
    treat a heart attack caused additional injury), if he had been
    taken to the hospital sooner, see
    id., or if
    Dr. Holland had
    received assistance exclusively from hotel staff rather than from
    other hotel guests experienced in the medical field or with life-
    saving training.25    In fact, when confronted with this lack of
    evidence at oral argument, Appellants conceded that this evidence
    was not in the record before us26 and that they did not know whether
    the result would have been any different had El Conquistador done
    everything that Appellants claim it should have done.               Because
    Appellants cannot point to any evidence in the record from which
    a reasonable jury could conclude that, more likely than not,
    Dr. Holland would have survived had El Conquistador not breached
    its alleged duties to aid and to provide safety devices, they have
    failed   to   establish   causation   with   respect   to   these   claims.
    25  The evidence establishes that Dr. Holland quickly lost his
    pulse on shore, and the AED would not have functioned without a
    pulse. Further, two doctors and a nurse attended to Dr. Holland.
    He had epinephrine administered to his heart, and he was
    continuously receiving CPR.
    26 Appellants stated that they intended to bring that evidence at
    trial. Of course, that is too late. See Ricci v. Alt. Energy,
    Inc., 
    211 F.3d 157
    , 161-62 (1st Cir. 2000) (explaining that if the
    evidence in the summary judgment record is not enough to make an
    issue upon which the jury may reasonably differ as to whether the
    defendant's conduct caused plaintiff's injury, summary judgment is
    appropriate).
    -33-
    See Tormos–Arroyo, 
    140 P.R. Dec. 265
    (noting that, under Article
    1802, a finding of causation requires that the injury be reasonably
    foreseeable and that it could have been avoided had the defendant
    performed the omitted act).
    Second, the parties also dispute the causation element
    of Appellants' duty-to-warn claim.      Principally, they offer two
    competing theories about Dr. Holland's cause of death.     Appellants
    argue that El Conquistador's alleged breach of its duty to warn
    caused Dr. Holland to drown because of strong ocean currents.     In
    contrast, El Conquistador contends that Dr. Holland did not die of
    drowning because of the ocean conditions but rather because he had
    a heart attack due to his untreated heart conditions.      It further
    argues   that   this   cardiac     event    was   unforeseeable    to
    El Conquistador, especially because Dr. Holland had filled out a
    form from Casa del Mar in which he stated that he did not suffer
    from any "physical disease, illness, or disability that would
    render [him] unfit for snorkeling."     According to Appellants, this
    dispute as to what caused Dr. Holland's death -- drowning because
    of the ocean currents or a heart attack -- is a question for the
    jury and, thus, summary judgment is inappropriate.     We disagree.
    "It is the role of the judge on summary judgment to
    determine whether a particular inference is reasonable."        Ricci
    v. Alt. Energy, Inc., 
    211 F.3d 157
    , 161 (1st Cir. 2000).   "Judgment
    -34-
    about whether an inference is reasonable is different from a 'judge
    superimpos[ing] his own ideas of probability and likelihood (no
    matter how reasonable those ideas may be).'"
    Id. (alteration in
    original) (quoting Greenburg v. P.R. Mar. Shipping Auth., 
    835 F.2d 932
    , 936 (1st Cir. 1987)).   "In fact, for negligence cases, . . .
    [i]t is the function of the court to determine . . . whether the
    evidence as to the facts makes an issue upon which the jury may
    reasonably differ as to whether the conduct of the defendant has
    been a substantial factor in causing the harm to the plaintiff."
    Id. at 161-62
    (third alteration in original) (quoting Restatement
    (Second) of Torts § 434(1)(a)).   Because a tort plaintiff has the
    burden of showing that it was more likely than not that the
    defendant's negligence caused the harm, "[a] mere possibility of
    such causation is not enough; and when the matter remains one of
    pure speculation and conjecture, or the probabilities are at best
    evenly balanced," summary judgment is appropriate.
    Id. at 162
    (emphasis in original) (quoting Restatement (Second) of Torts
    § 433B cmt. a).
    Under Puerto Rico law, not everything that causes an
    injury satisfies the causation element of an Article 1802 claim.
    Rather, "[a] defendant's actions may only be the proximate cause
    of a plaintiff's injuries if they in fact caused the injuries and
    the defendant could have reasonably foreseen that the injuries (or
    -35-
    related   harms)    would    result    from    his    actions."       Vázquez-
    
    Filippetti, 504 F.3d at 49
    n.6; see also Estremera v. Inmobiliaria
    Rac,   Inc.,   9   P.R.   Offic.   Trans.     1150,   1156   (1980)   (finding
    causation element not met because mugging in a dark hallway was
    not a foreseeable risk from a lack of lighting).              Appellants did
    not argue below or in their opening brief that a heart attack was
    a foreseeable consequence of failing to warn of ocean currents.
    Accordingly, any argument to that effect is waived.             See P.R. Tel.
    Co. v. T-Mobile P.R., 
    678 F.3d 49
    , 58 n.5 (1st Cir. 2012). 27
    Therefore, Appellants can only defeat summary judgment if the
    evidence in the record is sufficient to allow a reasonable jury to
    conclude that, more likely than not, Dr. Holland drowned because
    of strong currents and not because of a cardiac event due to an
    underlying medical condition.           See 
    Ricci, 211 F.3d at 161-62
    (finding "evenly matched" probabilities warrant granting a motion
    27 Appellants argued for the first time in their reply brief, and
    without any citation to the record, that "assuming that Dr. Holland
    died of a heart attack, . . . a cardiac event . . . was due to the
    strong currents and to the hotel's negligence in allowing
    Dr. Holland to go swimming that day and/or its failure to warn
    about the weather conditions." They further stated that they had
    deposed Dr. Manuel Quiles, a cardiologist, and that, although
    Dr. Quiles's deposition transcript was not included in the summary
    judgment record, Appellants intended to have him testify at trial
    in support of their position that Dr. Holland did not suffer "an
    infarct." Yet, as we stated in P.R. Tel. Co., an "argument [ ]
    raised for the first time on appeal without citation to any
    pertinent authority . . . is both inadequately presented and
    
    waived". 678 F.3d at 58
    n.5.
    -36-
    for summary judgment).     We do not think the evidence allows a jury
    to make that conclusion.
    Here, the evidence establishes that Dr. Holland had
    several medical conditions for which he was not being treated.              He
    suffered from obesity and, according to his forensic pathologist,
    had a "sick" and "considerably" enlarged heart, which can cause
    arrhythmias.       Dr.   Holland   also    had   untreated      hypertension,
    atherosclerosis,     plaque,    and   a    thickened     blood     ventricle.
    Although Appellants rely on the pathology report prepared by
    Dr. Cortés -- the forensic pathologist who performed Dr. Holland's
    autopsy -- as evidence that Dr. Holland's death was caused by
    drowning and not by a cardiac event, when asked to explain his
    findings at his deposition, Dr. Cortés stated that a heart attack
    was "probably" the precipitating cause for drowning.             Furthermore,
    according to Mrs. Jassin's deposition testimony, Dr. Holland did
    not look like he was drowning, and she thought he was having a
    heart attack.      In addition, although Dr. Cortés testified that
    water found in Dr. Holland's sphenoid sinus was consistent with
    drowning,   he   could   not   determine   at    what   point    Dr.   Holland
    aspirated that water.     The evidence in the record, however, shows
    that Dr. Holland aspirated water during his rescue attempt, after
    he was seen foaming at the mouth, and there is no evidence that
    his head had submerged under water before he started foaming at
    -37-
    the mouth and before the Jassins aided him.              Thus, any conclusion
    that Dr. Holland aspirated water before he started foaming at the
    mouth would be mere speculation.28             See Euromotion, Inc. v. BMW of
    N.   Am.,   Inc.,   
    136 F.3d 866
    ,    869    (1st   Cir.   1998)   (rejecting
    speculation as a basis for denying summary judgment).
    We thus conclude that, based on the record before us,
    Appellants have not met their burden of showing that it is more
    likely than not that El Conquistador's alleged failure to warn
    Dr. Holland of the ocean conditions caused Dr. Holland's death by
    drowning.    See 
    Ricci, 211 F.3d at 162
    (explaining that "[a] mere
    possibility [that the defendant's alleged negligence caused the
    injury] is not enough; and when the matter remains one of pure
    speculation and conjecture, or the probabilities are at best evenly
    balanced," summary judgment is appropriate (emphasis in original)
    (quoting    Restatement     (Second)       of    Torts   §    433B    cmt.   a)).
    Accordingly, Appellants are not entitled to try their claim at
    trial and summary judgment was appropriate.29
    28 This conclusion is also relevant to Dr. Cortés's testimony that
    "pulmonary edema" and "foaming at the mouth," both of which
    Dr. Holland exhibited, are symptoms commonly observed in someone
    who has suffered a heart failure as well as someone who has
    drowned. Since there is no evidence that Dr. Holland's head was
    submerged in the water before he was seen foaming at the mouth,
    Dr. Cortés's testimony does not support Appellants' contention
    that it was more likely than not that Dr. Holland's death was
    caused by the ocean currents rather than by a cardiac event.
    29   We note that Appellants also challenge the district court's
    -38-
    III.    Conclusion
    For    the   foregoing   reasons,   we   affirm   the   district
    court's order.
    Affirmed.
    finding that the release form signed by Dr. Holland when he rented
    the snorkeling equipment from Casa del Mar also barred their
    Article 1802 claim.     However, our conclusion that there is
    insufficient evidence in the record from which a reasonable jury
    can rule in Appellants' favor on the merits of their Article 1802
    claim makes it unnecessary to further address this additional
    argument. See Flaherty v. Entergy Nuclear Operations, Inc., 
    946 F.3d 41
    , 56 n.16 (1st Cir. 2019) (declining to address additional
    arguments advanced by appellant because his appeal failed on other
    grounds).
    -39-