The document analyzes the conventions used in the trailers for three horror films: Paranormal Activity 3, Dawn of the Dead, and Saw III. It examines the visual codes, audio codes, technical codes, and action codes for each trailer. Common conventions identified include dark lighting, ominous music, characters shown in states of fear or panic, and minimal details revealed to preserve surprises. The analysis is intended to inform the creation of the author's own horror film trailer for a school project.