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What's The Most Wild Movie Fact You Know?

Come on, blow everyone's minds.

Everyone loves chilling out with a good movie.

But there are usually some interesting, cool and straight-up wild facts about these movies that don't get spoken about enough.

Did you know, for example that Michael Caine was so terrified of Heath Ledger's Joker in The Dark Knight that he forgot all of his lines in the first scene they shot together?

Or that O.J. Simpson was almost cast as the Terminator, but James Cameron thought he was "too pleasant" to portray a dark character?

Or even that the Titanic cost more money to shoot than the actual ship cost to build?

So, what's the most mind-blowing, WTF movie fact you know? Use the dropbox below to tell us, and your submission could be featured in a future BuzzFeed Community post or video!