“OK, so let’s really play that out: you’re Jack, you’re in water that’s -2 degrees [celsius], your brain is starting to get hypothermia. Mythbusters asks you to now go take off your life vest, take hers off, swim underneath this thing, attach it in some way that it won’t just wash out two minutes later — which means you’re underwater tying this thing on in — 2 degree water, and that’s going to take you five to ten minutes, so by the time you come back up you’re already dead,” he said.
“So that wouldn’t work. His best choice was to keep his upper body out of the water and hope to get pulled out by a boat or something before he died. They’re fun guys [Mythbuster hosts], but they’re full of s**t.”
Cameron, however, remained firm there was only one outcome for the film: Jack’s death.
“Maybe we screwed up and the board should have been a bit smaller, but the dude’s [Jack] going down,” he said.