I’ve seen the same thing happen at ranges on a number of occasions.
Heavy caliber, double action revolver and a limp wrist holding it. “Pop Pop” fast, followed by lots of loud voices, the clatter of the gun hitting the ground and sometimes blood where the front sight tried to bury itself in someone’s forehead.
Newbies have no business handling a firearm with significant recoil.
I think the problem is guys wanting to ‘get a thrill’ out of fire a ‘big gun’ without understanding proper handling. While not exactly the same, this sort of reminds me of a video I watched years ago of a guy in a quarry shooting a .50cal Barrett from a bench rest at a distant target. He was using regular non-military rounds and shooting at a 1” steel plate. Problem is those rounds don’t penetrate steel very well and he didn’t angle the plate. His friends are filming this, he fires, you hear a distant ping from the plate impact, a second later you hear a ‘zip’ and see a little puff of dirt in front of the bench and the guy’s hearing protection flies off his head. The bullet ricocheted off the plate and came back and nearly took his head off.