The document provides an analysis of the opening sequence of a film called "Cleaner". It summarizes that the opening sequence establishes a sinister and mysterious atmosphere through low key lighting, cast shadows, and the figure of a male who could be the killer or detective. Sound effects of wind and rattling chains in an elevator scene add to the thriller-like sensation. Additional shots show conventions of the thriller genre through bloody props, investigative settings, and costumes like a cleaner's kit covered in blood and dirt that symbolize both a thriller and crime investigation. The slow, low-pitched opening music builds up to a fast pace, hinting that the film will get more chaotic and scary, while fast cuts make it seem frantic, conve