The document discusses techniques used in film trailers to create atmosphere and build tension. It analyzes the trailer for 10 Cloverfield Lane, praising its use of asynchronous sound and rising tension in the music to unsettle viewers. Examples from other thriller/horror trailers demonstrate how editing techniques like cuts, close-ups, and focus pulls direct attention to build suspense. Lighting, colors, and filters also set mood and provide clues about the plot and characters. The document considers how these techniques could be applied to create an effective trailer that makes audiences want to watch the full film.