I was at work on Monday and was setting up something on one of the cubicle desks, as I pushed a lamp to make room I see these huge sparkle and hear a "ZZzzzzzzt!". It was the lamp. Apparently it made contact with a metal light shade that was attached to the cubicle and created a short, which sent sparks shooting and created an arc.
Here's the lamp next t the cubicle after it arced.
And here is the mark it left on the cubicle.