The TV show Mythbusters tested James Cameron's version of Titanic. Never mind that the movie was a work of fiction, this is important stuff! The issue came up when, 15 years after the movie was released, the internet questioned why Jack died instead of climbing onto the floating piece of wood with Rose, which appeared to be large enough for both of them. Cameron explained it was a matter of buoyancy rather than room. Adam Savage and Jamie Hyneman put that assertion to the test. The result? They could have both survived -under very specific circumstances you'll have to read about to follow.
Cameron’s good-humored response: “I think you guys are missing the point here. The script says Jack died. He has to die. So maybe we screwed up and the board should have been a little tiny bit smaller, but the dude’s goin’ down.”
Because that's how fiction works. Link
(Image credit: Don Feria/Discovery Channel)