A Horror Film Thread

Are there any horror fans out there? I thought it would be cool to suggest and discuss really good horror films. Some awesome films I've seen lately are

A Serbian Film http://www.imdb.com/title/tt1273235/
I Saw The Devil http://www.imdb.com/title/tt1588170/
Triangle http://www.imdb.com/title/tt1187064/

A Serbian Film is seriously messed up and if you like extreme horror films with a good story then I highly recommend it.

I'm a big fan of the classics myself. However, I did love 30 days of night, that was awesome. Then again, I'm biased when it comes to movies, since I never see them for what they are, I'm always looking at the special effects since that's the business I'm in.