One of the sight gags in this film was achieved with a simple camera trick: a seemingly impossible number of cops pile into a police car, one after another. The trick was accomplished by stopping the camera, having the actors get out of the car, and then climb in again as the filming resumes. But the trick is accidentally revealed by an unexpected visitor: at the lower left of the image a spotted cat ambles up the sidewalk, then stops to watch. A moment later, when the camera cuts from one take to the next, the cat vanishes.