Paranormal Activity did something similar to the TV spot for The Devil Inside that has just been released. Instead of showing the movie they’re showing how a group of people are reacting to it.
Plot Summary: In Italy, a woman becomes involved in a series of unauthorized exorcisms during her mission to discover what happened to her mother, who allegedly murdered three people during her own exorcism.
For the curious, the trailer for the film is below.
Tags: The Devil Inside