(All the trivia is from www.imdb.com)
1) Dawn of the Dead (1978) – The MPAA had threatened to impose the X rating if George A. Romero didn’t make cuts. Romero did not want to cut the film, and he was adamant against an X rating, due to its stigma of hard-core pornography. In the end, Romero was able to persuade his distributors to release the film with no rating, although on all advertising and trailers, there was a disclaimer that in effect read that while there was no explicit sex in the film, the movie was of such a violent nature that no one under 17 would be admitted
2) Ghostbusters – The original script had a budding romance between the cynical receptionist Janine and the blissfully out of it Egon, but most of it was edited out of the film. The special edition DVD features a deleted scene of Janine giving Egon a coin for luck before he goes off with the other Ghostbusters to fight Gozer; they are interrupted by Venkman. The relationship between Janine and Egon was explored more in the animated series that followed.
3) Sex, Lies, and Videotape – On the first day of production, the producers sent a telegram to Steven Soderbergh; they teased him good-naturedly, telling him they’d heard reports that he couldn’t direct traffic. Twelve years later, Soderbergh won an Oscar for directing Traffic.
4) Rebel Without a Cause – All three lead actors, James Dean, Sal Mineo, and Natalie Wood, died young under tragic circumstances: Dean died in a car accident, Mineo was stabbed, and Wood drowned. In addition, Edward Platt committed suicide in 1974
5) Chronicle – The pink haired girl played by Anna Wood whom Andrew was making out with is actually the real life girlfriend of Dane DeHaan (Andrew)