You laugh but... I once worked a middle-sized manufacturing company, mostly welding and metalforming. We had an enormous 9" angle grinder. The vice president of the company was doing some work on his house, siding I think, and needed to make a mitre cut on an inside corner. He took home the 9" grinder, mounted a table saw blade in it and went to town. Of course it instantly kicked back, and ended up nearly severing his left hand just above the wrist. Surgeons were able to re-attach it, but it served purely cosmetic functions after that event.
Maybe sometime I'll tell the story of our shear operator, who bypassed 6 layers of safety procedures and mechanisms and went on to earn the name "Stumpy Joe"