I've had a few belts in my time from various machines. The last one was when I touched two sepparate machines simultaniously and got 240V right across my heart. I found that the earth wire in one of the mains plugs had corroded, and, due to the fact the machines had switched mode PSU's which reference ground, I got a handfull of volts. I had to report it and fill out all the forms, rest, etc.