I'm not going to waste time going over the plot. This movie was too irritating.
I don't understand how any screenwriter, director, or producer could develop such a dark and frightening story with this intelligent premise, and then feel the need to revel in some inexplicable nonsense. After establishing such a realistic and creepy atmosphere, you then let the audience off the hook? You stray from a frightening psychological thriller that is grounded in reality by throwing in some bogus, over the top garbage? Nobody can believe it! Even if the extra action shots look cool, there will be no lasting affect on any intelligent viewer! Not one! Quit ruining movies!! I don't mean to go off on a rant here, but geez. A little more realism will go a long way...