This document summarizes several sub-genres of horror films: body horror involves the destruction of the human body; comedy horror combines humor and horror; gothic horror features elements of horror and the gothic style set in places like castles; psychological horror relies on inducing fear and tension through manipulating human psychology and sometimes supernatural elements; slasher films focus on a psychopathic serial killer using weapons to murder victims and build mystery and suspense. It also provides examples for each sub-genre and briefly compares the films "The Exorcist" and "Insidious" in how they involve the supernatural affecting a vulnerable child character.