Dirty Harry "Rawhide", was responsible for creating Callahan's distinctive old-fashioned brown and yellow checked jacket to emphasize his strong values in pursuing crime. Filming for "Dirty Harry" began in April 1971 and involved some risky stunts, with much footage shot at night and filming the city of San Francisco aerially, a technique for which the film series is renowned. Eastwood performed the stunt in which he jumps onto the roof of the hijacked school bus from a bridge, without a stunt double. His face is clearly visible throughout the shot. Eastwood also directed the suicide-jumper scene. The line, "My, that's a big
Dirty Harry Impact" in 1983 (directed by Eastwood himself) and "The Dead Pool" in 1988. In 2012, the film was selected for preservation in the National Film Registry by the Library of Congress for being "culturally, historically, and aesthetically significant". A killer (Andrew Robinson) shoots a girl in a hotel rooftop swimming pool. Police arrive at the crime scene, where SFPD Inspector Harry Callahan (Clint Eastwood) finds a blackmail note signed "Scorpio" ordering the city to pay $100,000 or he will continue to kill. The mayor (John Vernon) asks police officers what is being done to track the killer. During lunch, Inspector