Revealing mistake: Mr. Owen's dramatic appearance begins with a precise pool shot. But Owen is standing behind the table in a position incompatible with the angle the ball was shot from - someone else out of frame must have performed that shot. (01:31:50)
Revealing mistake: Dr. Armstrong uses his lighter, which, true to its name, lights the room. The whole room, with a disproportionate intensity. Even if you consider it as an acceptable exaggeration for practical purposes, especially in such old motion pictures, the set lights are turned on with half a second of delay, making the trick painfully obvious. (01:07:40)
Revealing mistake: The 'bee' on the window - immobile in the first shot - is just a dummy with static wings. (01:00:45)
Revealing mistake: Rain is pouring on the windows, but when Lombard comes back with the bad news about the General, he's in pristine condition. (00:33:50)
