When Maximus and gang are in the colluseum during the battle of Carthage, Maximus gets on the horse.

When he rides in an arch fashion from right to left the film flips, his shoulder guard is now on the wrong arm and his spear he picks up, then it flips back, its very noticeable. Also when Juba throws Max the sword while he is on horse back the sword never quite reaches his hand fully, but still manages to catch it?