Eh, whatever, tried to "quote" and it didn't work. Would have to say The Exorsist really transcends the ages, though, despite changing social norms etc. (computer graphics). I nearly piss my pants every time she pisses hers and if you've seen the "un-cut" version where she bludgens herself with a crusifix and proceeds to tell her mother to "eat me," there is no other movie that can really do justice to the shocking Evil portrayed in that film or book. Com'on now...Demi, Demi...with that crazy voice? Terrifying! Granted the first time I saw the movie I was very young and repeated the lords prayer until I fell asleep, I still get the heebie-jeebies.
I agree; The Ring was also pretty scary as well and for some reason when the deer freak out (if I can remember correctly) in the first one and the horse in the second one affect me just like when Regan pisses herself. There is just something disturbingly sinister about losing self control. Also, a more recent depiction is in Paranormal Activity (which wasn't scary) when after she kill the boyfriend she just sits on the floor for like two days or something.
Damn...come to think of it, I haven't seen a really good scary movie in a long time, and I'm a big horror film buff. The only one that was more interesting than scary was the new one with Anthony Hopkins, but I can't remember the name. Oh, well.