I once shot a deer that had walked directly below my stand. The arrow went between his right shoulder blade and his spine and came out low in his chest, as he was walking away from me a couple of yards from my tree stand. Although I searched for the next two days, I never found the deer, but I was sure he eventually died.
A month later during gun season, a young fellow killed a deer with a rifle that look just like the deer I had shot, including an unusual set of antlers. The deer was killed less than a half mile from where I shot the one from my stand. On further examination it was observed that the dead deer had a been shot exactly where mine had been hit and carried the marks of entry and exit wounds from a three blade broadhead like the Thunderhead I had been shooting. Obviously, it was the same deer that I thought I had killed and did not. That shows you how tough those animals are and how uncertain a straight down shot can be even when the deer is hit exactly like you tried to hit it. I probably won't try that shot again.
Allan