Horror films commonly use certain conventions including dark colors, low lighting, isolated settings, exaggerated sounds, and specific props associated with villains. The characters are usually placed alone in isolated small towns or abandoned places with a dark history. Common character types include the main protagonist or victim/hero, a villain such as a monster or serial killer known for their killing method, and stereotypical teenagers who are killed. Camera techniques like handheld shots and close-ups create a sense of realism and observe emotions. Themes often involve good vs. evil, revenge, madness, nightmares, or the supernatural.