havent seen anything really scary... but with my education background and imagination and experience, i can make something that will really make you turn white as a ghost... that is if i have the financial backing for it ;)
The original Texas Chainsaw Massacre. I don't know how scary it would be for me now but I was young when I saw it and it scared the begeezes out of me. Maybe because it was supposed to be based on a true story.
the original Exorcist but i wasn't THAT scared its just the scariest movie out of all the horror i watched and the horror movies i watched weren't that scary meaning the original Halloween, Halloween 2, and The Fourth Kind