That's horrible and I feel bad for him, but you would have to be completly retarded to not disconnect the ignition fuse/relay and make sure the neg cable on the battery was securely disconnected before you did that. There is a notorious retard named Wally that did the same thing when I went to automotive school. The same retard managed to set off an airbag while facing backwards in a Ford Ranger and put his head through the back glass.