I'll echo The Descent and [Rec] (not Quarantine, that was a piece of shit).
How about Let the Right One In or Inside (À l'intérieur).
Funny how 3 of the 4 I listed are foreign films. North America cannot seem to make a decent horror film anymore. Le sigh. :\
KT
LOL, he said he doesn't like slasher flicks. Inside is like the ultimate slasher flick.
