The document analyzes the techniques used in the trailer for the horror film "The Enigma" to build suspense and intrigue without revealing crucial plot details. It notes that the trailer leaves many questions unanswered about why the antagonist Freddy Krugger is killing people and how it is possible. Through quick editing, close-up shots, and a dark, low-key color palette, the trailer builds tension and focuses on the killer's threatening appearance to leave viewers wanting more information that can only be discovered by watching the film.