M.Wuen, if you pay attention to the video, there are 2 people there. They are doing a retrieval of the buck that one of them harvested. One fellow was videoing the retrieval, and the other had the gun. The one with the camera could drop it, throw it, or stomp the camera into the ground, and still had no way to dispatch the buck. If anyone hunts for any substantial length of time, there is a high probability that you will wound a deer. At this point you track it and get another arrow or bullet into it to dispatch it.

I have seen it many times. I've even had quite the same scenario, where I came up on a hillside washout. The buck was laying there, but had his head up looking at us. The fellow shot it in the head. We walked up to it, poked and prodded it, and rejoiced the harvest. Then it started to move. lol The last bullet had gone under the skin just beneath the antler, and exited under the jaw (unbeknownst to us). Another well placed shot and he was dispatched. It happens, It's hunting.