It’s something much more sinister than infidelity when Mark (Sam Neill) gets ditched by his wife.

"The genius of Zulawski is that he's dispensed with all the buildup and explanation and logic. How many horror-movie explanations make any sense? He just made an entire movie out of the scary parts, the way a different genius concocted only the muffin top and some pop music producers give you 10 minutes of beats and chorus. Possession climaxes for two whole hours. It's as if, with The Shining, Stanley Kubrick found 25 variations on 'here's Johnny' and 'red rum.'" —Wesley Morris