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 (character) that "I'll take all the edge I can get". When Al Quan becomes Callahan's partner in "The Dead Pool", the inspector respects Quan's experience but does not want to work with anyone because, he says, "most of my partners end up in the hospital or dead"; he warns Quan to "get a bulletproof vest". It is a recurring theme in the "Dirty Harry" films that Callahan has a high turnover of partners; most are killed or wounded while working with him. In "Dirty Harry", he mentions two unseen partners named Fanducci and Dietrich; Dietrich is in the hospital having been