What It's About: A group of American tourists stays at an Eastern European hostel, only to be taken captive in the middle of the night. They're auctioned off to a sick group of wealthy businessmen who want nothing more than to torture them mercilessly.
Why It's Disturbing: This film basically made the phrase "torture porn" a real thing. The violence is so disgusting and in-your-face, it's unreal. Dismemberment and mutilation is where it starts. Pulling an actual eyeball out of someone's actual head is where it goes.