I've never been able to stomach horror movies that well, but I wanted to watch this for Leighton. Despite playing a fashionista, she's very unlike Blair. Very creepy. Man! Quite psychotic indeed!
In case you haven't seen the movie, I'll put the reason under a cut. It's happens midway through the film and I don't think it's too spoilery but to be safe.
( That traumatic moment... )