Revealing mistake: The "hand" holding the gun rotates 180 degrees while the shooter's point of view does not move. A real hand can't reproduce that motion without moving extremely close to the face.
Spellbound (1945)
1 revealing mistake
Directed by: Alfred Hitchcock
Starring: Gregory Peck, Ingrid Bergman, Leo G. Carroll, Michael Chekhov
Continuity mistake: During Ingrid Bergman's first scene, she is having a psychiatric session with a patient. Suddenly, you hear the sound of the door opening. The camera immediately goes to the door, showing two men standing side by side, both perfectly still and standing in a place that would have required more movement than the time allotted between shot changes.
John Ballantine: Do you want ham or liverwurst?
Constance Petersen: Liverwurst.
Trivia: Hitchcock's cameo is him coming out of an elevator at the Empire State Hotel, carrying a violin case and smoking a cigarette. (00:43:00)