With so many movies today about exorcisms, I was expecting just another copy of those movies, but on my surprise, this movie was different and well shot, quite scary. Atmosphere was good, makeup was done brilliant and almost everything in short was great, but there were few mistakes in some scenes that were too unrealistic and basically mistakes. For example: When Megan shows Lisa the footage of camera where corpse is clearly visible in the corridor, Lisa says that it's just a shadow? Seriously? Shadow of what? How in the center of something there can be shadow of nothing? And then Lisa notice...