I had a run-in with my 9" angle grinder 2 weeks ago cutting bricks - had just finished the cut and stood up not knowing the guard had come loose and swung around. It got me on the side of the wrist - my reflexes saved my hand from leaving home and is now healed but it still freaks me out to think on it. Don't think I'll ever use it again, but have no qualms with my 24" chainsaw....have always been scared of big grinders