I go bang!
Even professionals don't get it right every time.
I was in my office in Germany, standing next to the window and stumbled, I reached out and put my hand in the electrical socket - the German sockets have the positive and negative buried out of the way and the earthing prongs stick out of the socket, great for earthing things or clamping the earthing strap to, before working on electronics...
Only the electrician must have been in a hurry and on the one plug where I stuck my hand, he had managed to connect the earth to the positive phase and the positive phase to the earth. I couldn't use my arm for nearly an hour and hurt like hell! The engineers in the production area wouldn't believe me, until they came over with a tester... Followed by quickly turning off the power and righting the electrician's wrongs.
Biting the hand that feeds IT
