I frequently point my disfigured left index finger at my kids and grandkids, exclaiming, "Be careful with power tools!"
'Clipped the finger to the bone with a Lancelot tool, which is a circular high RPM chainsaw tool mounted on a hand grinder (pun intended).
I was lucky as it was a careless, stupid mistake such as this chipper tragedy, caused by not following proper safety procedure.
It's possible for proper training to avoid unsafe practices ... it's damn near impossible to train to avoid STUPID!