The document provides analysis of trailers for the films Split and Dream House. For Split, it examines how the trailer uses shots, lighting, costumes and music to build tension without revealing the plot. For Dream House, it analyzes how the trailer employs conventions like changes in music, lighting and shots to suggest something is amiss with the new family's home and hint at a disturbing past crime. Overall, the document discusses the filmmaking techniques used in both trailers to engage audiences and tease the thriller/horror elements without fully disclosing the stories.