Revealing mistake: When Hunt is bringing the eagle egg to Shaquinna, he trips over a log and the egg goes spinning through the air, during which time you can see the wire that the egg is attached to. (00:59:15)
Revealing mistake: When Chris is being hanged you can see the back of his jacket being pulled up from the harness.
Revealing mistake: When Mathew is looking at the stars and his telescope falls, the wire that is attached to the telescope is visible.