There is some type of competition involving the military, in I believe it's Britain, where they have to disassemble and move a field artillery piece over walls, rivers and ponds, and all sorts of other obstacles, then reassemble it and fire 3 shots in rapid succession. It's very dangerous and a lot of guys get hurt doing it. Everything from smashed hands and fingers to broken limbs. I don't know exactly what it's called, but it's exciting as hell to watch. The guys who compete in this are unbelievably fast. Perhaps someone who knows can post a link. Bill T.