So, you can probably guess who is in this movie which prompted me to see it, despite the fact it is a horror movie and I am not a fan of the genre. That said, I really enjoyed this, despite the gore, and mostly owing to the fact it was incredibly clever and had a whole host of actors I enjoy, not just Chris Hemsworth. It seems the key to the horror movie genre is to give me a puzzle to solve while watching.
ps. The poster above was the one I saw used to advertise the movie, and it is very clever. But according to my movie poster site the one below was the original one. I like it more, but I can see why they had to go with something else. The third poster is a bonus poster, just for fun.