No actors had the same script or were on filming location at the same time.
Filming began in 2007 to keep the 'found footage' authentic looking as possible.
The actor Garett Pringle put on 30 pounds for the role by not exercising and eating only potato chips for three months straight.
Four different endings were filmed to keep audiences from spoiling the context and ending of the film.
Specific death threats were sent to the director, and the staff of the theater, not to play the film in the town where the actual story took place. Multiple policemen had to escort the director in and out of the building for safety measures at the test screening.