The scene where the mutilated head pops out of the water is a reference to a similar scene in this film, where a severed head pops out of the hull of a boat.
Sistine Stallone's fall into the water is filmed in the same way as Michelle Joyner's at the beginning of "Cliffhanger" film starring her father Sylvester Stallone.
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What is the streaming release date of 47 Meters Down: Uncaged (2019) in the United Kingdom?