I agree "Silence of the Lambs", "Hannibal", and"Sleeping with the Enemy".Oh!
that was really creepy.
I saw "The Excorcist" when I was younger with some friends. At that time it was a really freaky movie. My younger brother knew I was going to see this movie. He set me up. He had a yoyo that glowed in the dark once heated by light. I came in, went to bed and when I laid down to cover up......the 2 eyes glowing in the dark were right above in the light shade. Needless to say, I screamed and he was laughing in his bedroom. Oh Yea!
I came real close to having poop in my underwear. LOL I'll never forget it.
In terms of most frightening, Swampy goes with The Vanishing, and Alien.
However, Swampy has never seen The Exorcist, or Jaws, both of which are acclaimed for their fright...
The Town that Dreaded Sundown is a personal favorite of mine. So creepy.
My Husband then BF left the movie Seven at my apartment while we where dating. I watched it while I was alone. Needless to say I didn't sleep that night and had to watch Forest Gump about seven times in a row to get the movie out of my head!
The Grudge-I hate this movie! something about lil kid "monsters" really gives me the heebie jeebies!
Other than i would say One Missed Call! this one really scared me and i almost had nightmares!
Silence of the Lambs was a very scarey and nasty movie, The Exorist is right up there and and oldie but goodie..The Night of the Living Dead....
I saw "The Exorcist" when it came out in the theaters in the early 70s...
and, I've never been able to watch it ever since.