The document discusses several common conventions and subgenres of horror films. It describes conventions like screaming to build tension, identifiable costumes, contrasts between good and evil, use of sound to build tension, eerie settings, unknown killers, lone female characters, chases, reflecting societal fears, use of weapons, young victims, blood, and jump scares. It also lists several horror subgenres including creepy kids, rampant animals, paranormal, science fiction, supernatural, slasher, erotic, gore, dark fantasy, satanic, gothic, thriller, and comedy/psychological. The final section summarizes theories about genre from scholars like Daniel Chandler, Jonathon Culler, Rick Altman