Loved it but was perplexed by it's structure. 55 of its slim 75 minutes are the girls and boys hanging out, with the fun occasionally interrupted by Courtney's memories and dreams. As soon as the killer manifests as a real presence, we are in his mind, and the girls try to escape it. But note that as soon as TJ enters, early on, the fun that the girls are having is already subtly threatened. The jokes among the group get more antagonistic. The killer manifests the fear that the things they enjoy, sex and music, might turn out to be ugly. Expertly shot, too.
Very funny to film this as a (very efficient) horror movie. Sympathetic to Diana whithout making her likeable necessarily, for example she keeps creating situations for her underlings that feel very uncomfortable. The final scene was especially hilarious because it posed the utopian question "what if we could be this disgustingly rich while just eating fast food garbage and without having to display a sense of tact or knowing classical music and such stuff, i.e. be the Trumps?"
Has a great Stewart questioning the notion of linear time rather early in the movie (half a point bonus).