I recently had a 100mm hole to cut in 75mm softwood timber. Instead of using my pillar drill I used my big hand drill, couldn't find the side handle. Being in a hurry I went ahead, you know what's coming next...…… the cutter jammed in the workpiece, broke my wrist in two places apart from tendon damage. Just got the pot off yesterday. For the sake of taking time with the right gear, which I have, lost six weeks of workshop fiddling. Careless and stupid I know.