Seriously, this movie is fucking incredible. I know it just came out, but if you haven't seen it yet you should definately go see it soon. I just got back from watching it about 2 hours ago and I can't stop thinking about how amazing it was. It constantly keeps you guessing from beginning to end and as it keeps building up towards the ending and what happens in the ending is also amazing and a fantastic ending at that too. It will keep you on the edge of your seat.
Some people in the theater I was in even screamed as well because of some of what happened in some of the scenes.