Revealing mistake: After the flashback where the police investigator tells Augusta he could murder her, and she asks him who'd solve the crime, it cuts to a man outside a store window looking into the store, whilst the investigator watches him from across the street. When this happens, two extras walk into the shot, and the extra wearing glasses can be seen looking at the camera when he walks by. (01:07:55)
Revealing mistake: When Miss Dempsey lifts up Gripper Burke and spins him around before throwing him out of the window, you can see that Bernard Bresslaw has been replaced by a dummy.
Revealing mistake: Whenever Stupid Bat is flying, the wires pulling him up are visible.
Revealing mistake: After Clint has shot the 3 would-be rapists, he is rifling through the pockets of the dead men. As he checks the pockets of the first guy he shot the "dead" guy in the background is breathing.