In the scene where Doug pretends to have something wrong with his horse so he and Tony can jump their guards, Tony goes to punch one of them, but clearly misses by several inches. However, the punch sound effect is still heard and the guard is knocked out.
In the scene where Tony fights Yellow Elk, near the end of the battle Tony kicks Yellow Elk in the long shot, knocking the knife out of Elk's left hand. In the close shot that follows Elk's left hand is empty. Then the camera cuts back to another long shot and Elk is holding the knife again.
I'm told by several folks that the scenes purporting to be of the Little Big Horn bear very little resemblence to that area of South Dakota.