I once worked maintenance at a department store, and one of my main responsibilities was electrical repairs (despite lack of formal training). The lighting circuits were all commercial 277 volts. A fluorescent light appeared to be burned out, but as I was changing it, I learned that it was actually a wiring issue when I was installing the new tube atop a 12 foot ladder. My knuckle grazed the fixture and I lit up like a Christmas tree. The resulting reflex caused me to crush the fluorescent tube, but somehow I managed to not fall. Oh, hello death, I acknowledge the brush.