The opening sequence of Memento begins with the title screen and opening narration. It then shows a point-of-view shot of a polaroid photograph being held, depicting a dead body with blood on the walls. As the photograph is flickered, the blood appears to move backwards, revealing the sequence is in reverse. Unusual sounds and a creeping score also build tension. This introduction establishes the psychological thriller genre and key themes of death, mystery, and anxiety through its reversed visuals and audio.