When I was a kid, my dad kept watching programs that weren't suitable for youngsters. Every time I came out of my bedroom, he was watching something that scared me. Now, certain kids' movies still creep me out like the Scholastic version of Jacob Two-Two Meets the Hooded Fang, the original Annie, How the Grinch Stole Christmas!, and a few others that I shouldn't be afraid of anymore, but still am.
As for adult movies, there are a few I'm too afraid to watch or listen to, like the original Pet Sematary, The Silence of the Lambs, Friday the 13th (Jason), and almost all the Chucky movies (except Bride of Chucky).
What movies scared you when you were young, and what still gets to you now?