Horror films typically feature stock characters like a helpless female victim or a creepy male killer hunting victims. Locations are usually dark, creepy settings like abandoned houses, woods, caves, or hospitals that can be made to seem terrifying through lighting, filters, and music. Effective horror films twist expectations by subverting stock characters, like the female protagonist in "Shrooms" who is revealed to be the killer, or by using an unexpected but unsettling location like a whole city.