In Titanic, the shaggy-haired heartthrob Jack Dawson says a few very suspicious things. Some super sleuths online noticed that, at least twice, he mentions places and things that didn't exist until after the RMS Titanic was already resting at the bottom of the Atlantic Ocean.
Maybe this happens because Google didn't exist when James Cameron was writing the 1997 romance. But maybe –– just maybe –– ol' Jack has a big secret.
Check out this video to see what this fan theory is all about.