Our old workshop was next to the pool. My boss was skimming the pool, and if ya'll know skimmers, you know they're long, metal rods. Anyways, the pool happened to be overflowing at the time, and as he was swinging the skimmer around he managed to knock one end against this machine and sent a serious shock through his hands and out his feet into the standing water. Lucky for him he was crouching and the shock straightened his legs, making him jump out of the puddle as well as pull the ends away from the welder and the pool, saving himself and probobly everyone in the pool.
Strangely enough, this was one of his milder near-death experiences on the ranch. I've personally witnessed three that I'd consider worse, as well as watched my brother weld his hands together.
So it was a shock, but I'd guess it weighs more than 500lbs, as three strong guys couldn't lift it. Hell, it took two of us to just TIP the damn thing. I'm trying to figure how I'd get it out of there if it's worth anything. It could easily crush a man to death.