The document analyzes conventions found in horror movie trailers, including tension, scary music, isolated settings, supernatural monsters or criminals, fast cuts at the end, death, and dark lighting. It provides examples from the trailers for The Purge, The Strangers, and Paranormal Activity 3. The Purge follows conventions with tension, suspense, darkness, and showing that those in power can be victims. The Strangers starts as a normal romance but changes with loud bangs to create tension. Paranormal Activity 3 includes darkness and supernatural elements but lacks fast pacing at the end and does not keep the audience guessing, instead following a circular narrative structure.