Here's one for the books. I was minding my own business, using a rotory cleaning carpets, the rotary head touched a heater grate and all hell broke loose! Sparks flying everywhere, as it turned out the outlet i was plugged into was wired wrong and when the rotory head touched the heater grate it shorted just like touching 2 wires together. First time for everything i guess scared the crap out of me though