The trailer for Psycho uses various film techniques to build mystery, suspense, and intrigue. It begins with quick cuts between close-up shots of a violent attack, set to unsettling music. Later, Alfred Hitchcock provides rare narration to further explain the disturbing motel crime scene. Throughout, the trailer employs low-key lighting, a torn shower curtain, cross-cutting between locations, and changes in music volume to generate fear and leave just enough unanswered for viewers to want to see the full film. Both conventional and unconventional techniques are used to attract an audience while preserving some element of mystery.