Paranormal Activity is a 2007 American independent found footage supernatural horror film written, co-produced, photographed, edited, and directed by Oren Peli. It is the first entry into the Paranormal Activity film series. The film centers on a young couple, Katie and Micah, who are haunted by a supernatural presence in their home. It is presented in the style of "found footage", from cameras set up by the couple in an attempt to document what is haunting them. Wikipedia
Micah: You're screaming like that over a spider? Katie: Well, yeah... did you go run and get the camera first?