The document summarizes and analyzes several film trailers. For the trailer of Apartment 1303, the author likes how non-diegetic sound builds tension and how the ghost girl makes the film spooky. In the trailer for The Apparition, loud screams and cracks in the ceiling make it dramatic and eerie. For Paranormal Activity 4, non-diegetic music builds tension and a dropping chandelier makes viewers jump. The trailer for The Purge uses changes in music and a doorbell to signal danger for a family. Finally, the trailer for Would You Rather uses sounds of footsteps and a ticking clock to build tension through unknown threats.