The most common use of the technique is in horror films (e.g., Cannibal Holocaust, The Blair Witch Project, Paranormal Activity, "Diary of the Dead"), where the footage is purported to be the only surviving record of the events, with the participants now missing or dead. It has also been used in comedy (e.g., Babysitting, Project X), science-fiction (e.g., Chronicle, Project Almanac, Europa Report), and drama (e.g., Exhibit A, Zero Day).