I'm sure this theory is quite old but I find it funny so I thought I'd post about. That is the Titanic film theory, so in this theory it states that Jack is actually a time traveller, who was back in time to stop Rose from committing suicide.
When I've watched this in the past (only about a hundred times) I actually always noticed some facts that seemed to be way too futuristic for 1912. So my kid brain was pretty smart.
So if she had jumped on that fateful night, the whole ship and crew would have had to stop and look for her. The ship would have stopped, maybe allowing the weather to get warmer, and most likely would have never hit the iceberg. He spent so much time with Rose so he could ensure her survival, she couldn't die. That's why he had to save her from killing herself.
Here's how you just know he's a Time Traveller!
1. He doesn't have any of the currency of the day, so he has to gamble for it.
"When you ain't got nothing, you ain't got nothing to lose."
2. So he mentions visiting Lake Wissota, which was man-made but not until 1917, five years after the titanic met it's untimely demise.
3. This one is a little here or there. His haircut and satchel are not of the times 'fashion' for men. He looked more 1930s rather than 1910s. But I think as a poor man he a) couldn't afford haircuts and b) probably made the satchel. But no time travel is definitely the first option you go to...
4. Next, he tells Rose he'll take her on the roller coaster on Santa Monica pier. Well this wasn't built until 1916, suspicious.
5. This doesn't count, but when I first watched this I was way into Nickelodeon and so when he mentioned (after kissing Rose) "I saw that in a Nickelodeon one and have always wanted to do it." (not the exact quote). I was like what the heck, Nickelodeon was around back then? They were the first place you could go to watch little films and such, they were a big/revolutionary thing back then.
So with all this evidence, clearly he is a time traveller and it wasn't just awful fact checking that was way off on a couple of the scenes. James Cameron you probably should've hired professionals.
I like this theory though, it's funny to think people actually thought about this and even I as a child picked up on some of the inconsistencies with the facts and timings.
There are so many other theories/conspiracies out there and that is one of my favourite things to read about, some of them are spot on and then others are ludicrous but it's hours of entertainment. So I'll probably do a few more of these posts, yay!
Thanks for reading :)
Peace.