1) The document provides an analysis of the shots and scenes in the opening of a thriller film. It summarizes each shot's purpose in building tension, introducing characters and settings, and revealing information gradually to immerse the viewer.
2) Key shots include an introduction to the main character in a dark room, security camera footage showing another victim, and a flashback showing one character being followed unknowingly.
3) Details like lighting, costumes, placements of titles are described as important to set the ominous tone and imply danger and vulnerability without revealing all the details at once.