The document discusses conventions that are commonly used in horror movie trailers to scare audiences. Some key conventions mentioned include using suburban household settings to prey on audiences' fears of their own homes being invaded, including "jumpy moments" of scares to make the trailers more memorable and effective, and employing horrific imagery to further frighten viewers without showing too much that would prevent them from seeing the full movie. Mise-en-scene, lighting, costumes, fonts and other stylistic elements are also discussed as important conventions that help set the tone and tell the narrative in an engaging way for audiences of horror film trailers.