The Loved Ones
Oh man. 4.5 starts out of 5. It is like Misery and Fear (Mark Wahlberg, crazy stalker movie) had a kid and sent it to the prom. This movie is a horror movie, is a gore movie, but man, is it good. They set you up for a sexually charged teen angsty stalker movie but it gets sooo dark, and it keeps switching directions on you so what you think will happen, doesn't, then it does, but not when you thought it would.
It got a 97% on rotten tomatoes from critics, and unless this type of movie's whole premise will turn you off (and for some, it will. Especially older or more conservative audiences), you will not be able to look away or dismiss it once you're done, but it won't haunt you, it's more like a scary rollercoaster, than a movie like Hostel that creeps you out every time you see someone's Achilles outlined. And it doesn't rely on torture or gore like Saw does to shock audiences, as Hannibal would say, "That....is incidental."
Wow this movie is whacked, man. Just wow. Frontal lobotomies, dark humor, crazy deranged villian...so worth it.