My EX, post divorce, was out on her property and one of her neighbors was shooting in her direction (they're idiots). Ricochet off her forehead just above one of her eyes. It was a .22. To a woman, having a facial scar is pretty bad. Pretty sure, however, that she realizes that it was likely the best outcome (outside of NOT being shot at and hit).
Speaking of ricochets, it's possible that the kids hit the tractor and the bullet ricocheted off the tractor and hit the guy. Possible. So, it's therefore possible that they were really only shooting at the Tractor. Clearly, as the outcome tells us, this mattered little.
Hunting... I never wanted to hunt with a modern rifle. If you can't hit with one shot then stop: people are inclined to squeeze again. I would only hunt black powder: you're a lot less likely to pull the trigger hastily.