The document discusses the use of props in horror film openings. It notes that props are commonly used to add a sense of fear through close-up camera shots. A knife is a commonly used prop but the author decides against it since it has been overused. Religious icons are mainly used in supernatural horror films to make audiences uncomfortable. The group ultimately chooses to use keys as the prime prop in their opening, as it will create tension when the protagonist struggles to open a gate while being grabbed from behind.