I had a Saito 180 bite good when it surged against the hold down then came back into my thumb and forefinger at full throttle,lost half of my thumb nail and cut a chunk of flesh (about 1/3 of the tip under the nail) to where just a piece of skin held it on. Had to drive myself to the hospital(wife to shook up to drive) after about 20 stitches in the forefinger and half of my thumb nail removed they sent me home. this happened at home so even if you do things right it could still happen. Thet said if my reflexes were any slower I would be missing both fingers!