It's not a horror movie, but the original "Cape Fear" with Robert Mitchum caused me to walk out of the theatre because I just couldn't take the tension. I still can't watch it, and refuse to.
That's interesting...unbearable tension. That qualifies as a form of fear, I guess.
Anyone remember The Tingler movies?
I had the exact same reaction to the original "Alien" movie, in the theaters. I went in with a few friends to see a midnight showing of the movie, and on a really big screen, that was the most stress filled movie I had ever seen! In fact, in the scene where the cat jumps out of the storage locker, I said "That's it!" got up, and walked out!
The "chest bursting" scene was one of the wildest I had ever seen up till that point! If you think that the people around that table were amazing actors during that scene, it's because only the crew and John Hurt knew what was going to be happening! The other actors thought that he was just going to be having a seizure.
Mark
"Bio-Dome" with Pauly Shore. It was a horror to sit through.
Jaws...I still get nervous going any deeper than my knees in the ocean!
Also, The Ring was discomforting, as was Psycho, and The Shining.
And not that they used to scare me so much, but I used to love the Nightmare on Elm Street series (can't stand them now that I am an adult, though!)
My favorite is reall a sci-fi/horror movie. Alien (the first film) directed by Ridley Scott.
The original Alien, it was dark, dank and claustrophobic as hell
Another one that I try to never even think of is "IT". Talk about making yer skin crawl...