The document discusses common elements of the horror genre including iconography, characters, ideological themes, settings, and narrative structure. Iconography in horror includes symbols like revenge, hauntings, serial killers, demons, and monsters. Common characters are protagonists, villains like monsters or serial killers, idiots teenagers who get killed, and creepy children. Ideological themes involve the supernatural, good vs evil, religion, and psychological issues. Typical settings are isolated areas, abandoned buildings, forests, and graveyards. Narrative structures in horror films usually involve a protagonist on a mission to kill or solve problems, with slasher films following a formula where the villain returns to prey on teenagers after some childhood trauma.