Let's see I was only in the trade for about 3 weeks.At the time I was working for an old timmer his name was mr. burns!!! Any how we were working in a bank on the lighting 277v I was working in a junction box (5s box)mr.burns tells me " do you see them white wires there " I said yes I do he said they are dead go ahead and put them together.Well I did not know at the time use a tester never trust another persons word.With my elbow resting on the grid I went ahead and put all 8 of them together.That's when I first met god!! I could not let go !! There was a framer walking by and saw what was going on.He hit the ladder with a board to break me free..If it were not for him I would have been toast.Mr. burns never used a tester just his fingers.