Visible crew/equipment: When Voight is making his way down the cliff face, he is rappelling. You can see a crew member feeding him rope at the top behind the trees.
Continuity mistake: Just before the end, when going through the rapids, Burt Reynolds' life jacket moves around between shots. It's higher and lower depending on the angle.
Continuity mistake: When Jon Voight clings to a rock in the river, the rocks on the bank are the same rocks his canoe passes later as they flee in the canoe. (01:02:30 - 01:27:30)
Revealing mistake: The entire sequence of Voight climbing the cliff face is shot day for night, meaning the scene is supposed to take place during the night but was shot during the day. This is painfully obvious by the amount of contrast in the scenes we see sky (and the colored shots when he is on top of the cliff). When the camera pans up, it is a blue sky day but the scene takes place at night.
Answer: No wound. Shook his head and dove from the canoe. Refused his life jacket. Just ridden with guilt as he was dead set against burying the hillbilly.