If you watch Dirty Harry closely, in the beginning when he's giving the "I know what you're thinking" speech to the bank robber the guy gives up and Harry walks away. The robber says "hey, I gots ta know". Harry smirks, turns around, points the 29 at him, and then cocks it. The guy freaks out and then the camera goes to a frontal shot of Harry and shows him pulling the trigger double action. I notice stuff like that.