About a week ago I was disassembling an old sewing machine, breaking it down for my scrap bin. I tried the motor, OK, as was the light. Then I got started, so first thing was take the light off, this required cutting the cable (machine unplugged about 1/2 an hour), side cutters, BANG, the suppressor capacitor was holding full voltage, and I'd forgotten to discharge it. No shock, and the side cutters did not get the edges burnt, but a warning just the same.
Ian S C