A Nightmare on Elm Street - the first of the series. I can't imagine how many people were probably afraid to fall asleep after watching this movie! Bonus points for getting to see a young Johnny Depp in it!
The first Polaroid camera in our house was a huge deal . My dad went crazy posing us girls (there were 3 of us) and burning film like crazy. And YES! We ALWAYS shook the picture because we were certain it developed faster that way.