I have to chime in with the other ladies here.
I saw The Accused and it totally did me in. Everytime I first see a pinball machine, anywhere, that scene is the first thing that comes to mind. Whew. That was rugged for me. I had to keep stopping the tape and leaving the room, repeatedly, to get through that scene. Yowza!
Which is the main reason (besides the head bashing) as to why I would never see Irreversible.
Add:
Kill Bill
I Spit On Your Grave
Ichi the Killer
Natural Born Killers
and about 50 others
I have never watched the curb scene in American History X. I only know that it takes place and when to look away and cover my ears.
I own and love Braveheart, but even some scenes in there are difficult for repeat viewings. My heart aches too much and my gut gets too wrenched.
.
.
So yes, The Passion of the Christ gets added to the list as well.
Strangely enough, I did make it through some of Robocop, which surprises me to this day. I wouldn't watch it again though.