The document discusses conventions that are common across different horror subgenres. For slasher films, key conventions include a masked killer who stalks and kills teenagers, with one final female survivor. Psychological horror films often feature a seemingly normal antagonist who is later revealed to have a twisted mind, aiming to surprise audiences. Supernatural and possession films typically involve an evil spirit or demon tormenting a suburban family. Gothic horror commonly sets tales in faraway, mysterious lands with dark, ominous settings.