1. O.J. Simpson almost played the Terminator, but James Cameron thought his persona was "too pleasant" to portray such a dark character.
—Jessica Dacre, Facebook
4. The big scene in Pulp Fiction where Vincent stabs Mia in the heart with a needle was actually shot in reverse. So really, John Travolta was pulling the needle out of her.
5. The burning-of-Atlanta scene in Gone With the Wind was created by setting fire to old sets found on the MGM lot.
—Joseph Logue, Facebook
14. Judith Barsi, the 10-year-old girl who played Anne-Marie in All Dogs Go to Heaven, died tragically before the film was released.
—Bennie Potter, Facebook
19. The voice of Boo from Monsters, Inc., Mary Gibbs, was just a toddler during production. The crew couldn’t get her to sit still and read her lines, so they had her play in the studio while following her around with a mic.
21. ET and Poltergeist were originally supposed to be the same movie, called Night Skies.
—Karen Hobowsky, Facebook
22. Will Ferrell's reactions during the jack-in-the-box scene in Elf were totally real — the director surprised him every time he played with one of the toys by using a remote control.
Note: Submissions have been edited for length and/or clarity.