Many years ago I had an amazing escape from a large heavy 9" angle grinder. I was using it to remove old welds from a truck body.
These truck owners wanted these side and end extensions to the body to carry more gravel. They knew they wouldnt last long but to them it was worth it for the extra money they charged per load.
Anyway this was in the middle of winter so I was dressed in T shirt, flannel shirt, sweat shirt, very thick woolly jumper, overalls, jeans, thick quilted leather bikie jacket and leather apron.
The boss was too mean to replace the guards on the grinder so it was always used without one.
This particular day I'm grinding out the aluminium weld to re-weld it when it grabbed and kicked back.
It felt like a horse had kicked me and I stood there in a total funk waiting for the blood.
The disk had cut through all the clothing down to the flesh leaving just a thin red line diagonally down my chest and stomach, It hadnt even broken the skin.
Guess who's never used an angle grinder without a guard since?