Ugh!
Just had this happen where I was knocking out a 15' top of a Norfolk Pine. My employer has no prior knowledge of running ropes, so I knew I was in for a rough ride. As the top comes back into the trunk, I was never thrown in my entire career as I was that day. Next day there were bruises on my knees, forearms, shoulders, inner thighs and chest. I sent him the photos to show how important it is to start paying attention more.
Of course I wanted to kill him, but as I said, he knows not what he's doing.