Personally, the scariest fuckin' movies I've ever seen was Halloween H2O and House on Haunted Hill. I saw them when I was like 7 or 8 and I had to sleep with the covers on my head for 2 or 3 years no lie. Man, that part in Haunted Hill when the girl sees the people opperatiing through the camera and then they look at her and she turns around and sees the guy whos head is shaking and moving around all funny and then appears in front of her made me cry. Also the part in H2O when the guy got a skate in the face creeped me out big time.