Revealing mistake: As Aurelius and Wulfila fight, one shot after Aurelius lifts a long-handled battle axe, we can see two shots with a jet contrail in the sky, which were impossible in the 5th century AD.
Revealing mistake: During the long tracking shot at Dunkirk, steadicam operator Peter Robertson had a little assistance in getting around. This took the form of a kind of golf cart (from the beginning to just after shooting the horses), and later a rickshaw (from little after the choir to just before the steps ascending the billets). If you look at the ground to the left just as the camera begins backing away from the carousel, you can see tracks in the sand made by the rickshaw. Keep watching the sand near the actors' feet to see more.