I know this is a tough one...
I'll say some flicks that still freak me out...(in no particular order)
The Thing, Session 9, Texas Chainsaw Massacre, The Exorcist, Hostel...
But hands down the worst was seeing the Blair Witch Project for the very first time.
I saw it in the theater and I thought it was REAL footage. Does anyone remember that marketing they used when it first hit theaters?
I saw Blair in theaters and with the trailers I had seen on TV, I thought it was a "real" documentary movie with "real" ghost footage or something, so I went with an open mind.
They were doing some pioneering Internet mearketing too, with a fake website that made it look like it might have been real. It was weird! I left the theater very confused and scared to the core. That night I went home and watched some late night TV and saw one of the cast members on Conan or Leno or whatever and I felt I could breathe again.
I thought that was real and the sudden ending...you have to admit with that mindset and not knowing what I was watching, it totally FREAKED ME OUT more than any horror movie I've ever seen. And I've seen a bunch of horror movies...
What are your favorite horror movies or movie moments?