re: What is the Most Disturbing Movie you've ever seen?

ASF really isn't that bad. Sure, the subject matter is horrible, but it's not real...it's a movie. Whereas the two guys, one hammer video is real life (google Dnepropetrovsk Maniacs for some true horror). Some fricked up ones I've seen:

A Serbian Film
Cannibal Holocaust
Poughkeepsie Tapes
Men Behind the Sun
Human Centipede

Those aren't really too bad.

Some I haven't seen yet:

Audition
Salo
Irreversible (though I've seen the extinguisher scene)
Eraserhead (don't really care to see it though, looks boring)
Funny Games (bought it, haven't had a chance to watch it yet)
Begotten (caught some on youtube, looks boring)
Martyrs (also own it, need to watch it)
Antichrist