The tension in this follow-up to the surprise hit Paranormal Activity—the low-budget Blair Witch-like faux documentary in which a couple films themselves sleeping and review the tapes every morning for supernatural activity—is fueled by a sense of extreme vulnerability, a la Psycho's shower scene. The reason for introducing cameras in Paranormal Activity 2 is security surveillance after a family discovers their house has been trashed by vandals. The entire movie consists of footage from these security cameras stitched together by home movies, mostly recorded by the family's terrified teenage daughter.
More chilling thrills after the break.