I think you raise a good point about first time shooters getting “giddy” immediately following shooting off a few rounds. I always stand right up against them ready to grab the gun if, in their excitement, they don’t keep it pointed down range at all times. I tell them in advance of shooting that no matter what keep the gun pointed DOWNRANGE! Even if you think it is empty, keep it pointed DOWNRANGE! Even when you have the safety on, keep it pointed DOWNRANGE!
Then, as I said, not trusting inexperienced shooters I stand right next to them ready to grab the gun and often do.
I was amazed at the outdoor club i used to belong to that had many bullet holes in the above the head wooden beams. there are stories there. also in pa we have gun ranges on some of the state game lands which are self supervised. it is amazing what people think they can do while you are walking down range checking your targets.