Factual error: The "hard suits" the divers wear have soft, relatively normal gloves and soft joints. More akin to a football uniform with armor over spandex. They are at the bottom of the Mariana Trench, at 36,0000 feet below sea level. The pressure is over 7,000 psi. Without a hard suit, they would instantly be crushed.
Underwater (2020)
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Directed by: William Eubank
Starring: Kristen Stewart, Vincent Cassel, T.J. Miller, Jessica Henwick
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Answer: The helmet is designed to withstand immense pressure that is equally distributed over its entire surface. Direct blunt-force impacts by a hard metal object like a fire extinguisher may compromise the structural integrity.
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