I was totally surprised at how great this film.You could feel your paranoia rise as the film went on and as you gradually learned the details of the real situation.

This is one of the few movies I've ever seen where the whole audience broke into spontaneous, loud applause a third of the way in.

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.

Strong acting helps the film overcome an uncertain premise and create characters that hold our attention absolutely.