Joss whedon is on top of his game with Cabin in the Woods. A love letter to the genre that takes typical horror movie tropes and turns them on their ear.
There are plenty of red herrings, twists and turns, and an ending that is so over the top that for the final 15 minutes my jaw was on the floor.
It's not scary at all, which is kind of a bummer, but it is a hell of a lot of fun and entertaining.
I am not going to get into a full-fledged review because the less you know about the film going in, the more surprised you will be.