The movies made me do it!!!!!

[BoyScoutKevin]

I got a couple.

Thelma and Louise
When Louise (Sarandon) and Thelma (Davis) drove their car off the cliff at the end of the film, alot of people started committing suicide this way. As this method of suicide hadn't been used to a great extent before, people started thinking it was due to the film.

Lair of the White Worm
I have heard a number of couples re-enact the scenes in the film, between Lady Sylvia Marsh (Donohoe) and the boy scout (Pitt), from the time she picks him up hitchhking till the time she drowns him in the bath by stepping on his head with her boot. Hopefully, the last is just an re-enactment, or that is the first and last time the couple does that scene.