Another disturbing film is Schnidlers List (Spelling?)
That was the other i couldn't think of at the time....
Casino (hammer and vice anyone?)
Donnie Brasco (erm....)
Deer Hunter (Russian roulette fucked me up big styley)
Carlito's way (general)
Most war films (platoon, saving private ryan, Apocalypse now redux (man longest film with jsut pure violence and disturbance)
Black hawk down (bit boring after the first hour but still showed how real warfare should be like)
Most disturbing scenes you say .. hmm.. most love scenes with no nudity and all the "i love - why dont you love me?" movies
Ah of course, the flip side of the coin would be films as disturbing as legally blonde 2, Timeline.......but the best part of any film that made me cringe the most was in Jackass where they give themselves papercuts on their lips and in the webbing on their feet.....