The document provides a timeline breakdown of key events and elements in the trailers for three horror films: SAW, The Descent, and The Possession. For each film, the timeline notes the start and end time of shots showing logos, titles, characters, changes in music or tone, and other moments that set the scene, build tension, or move the plot forward. The timeline aims to analyze how the trailers for these horror movies effectively utilize techniques like music, editing, and visuals to hook viewers and establish an unsettling tone.