Jacob's Ladder- WTF 'cause of all the weird/freaky stuff, but still great.
The Thing- Angain WTF because of all the weird/freaky stuff, but man was it great.
Stay- I don't want to spoil anything, but the whole movie is WTF. It's excellent, if you haven't seen it, you should.
Closer- 'Cause I didn't expect it to be that raw with the language.