House of the Devil uses a familiar horror movie plot of a babysitting gig gone horribly wrong and turns it into something surprising. Samantha has no idea that her employers are raving Satanists -- but before the night is over, she'll become painfully aware. Rather than confuse torture and gore for genuine scares, director Ti West creates an atmosphere of terror that relies almost entirely on what you don'tsee. There will be blood, but not for nearly two-thirds of the film, in which practically nothing 'happens.' It's the most scared you will ever be by an (almost) empty house.