Revealing mistake: Near the beginning, after the corporal has burned his finger and tells the other corporal that Lawrence is balmy, O'Toole begins to run up the stairs to meet with a general. After O'Toole is out of view of the camera, you can tell he has stopped running up the stairs by his shadow on the wall not moving, because he knows that the director is about to shout "cut".
Lawrence of Arabia (1962)
1 revealing mistake
Directed by: David Lean
Starring: Peter O'Toole, Anthony Quinn, Alec Guinness, Claude Rains, Jack Hawkins
Continuity mistake: The shadows in the scene with Lawrence sleeping on his camel are short because it's the middle of the day. In the next shot you see long shadows on the sand. When Ali wakes up Lawrence they are short again. (01:01:41)
General Allenby: You acted without orders, you know.
T.E. Lawrence: Shouldn't officers use their initiative at all times?
General Allenby: Not really. It's awfully dangerous.