Pneumatic cannon shows up professional golfers

Sorry I don't have any digital climbing photos yet, this picture is from my camcorder. Basically, this is my third pneumatic cannon I have made, and as the name suggests it uses pressurized air to launch projectiles of various sizes large distances. Here it is shooting a golf ball (which cleared the school ground and traveled about 400m) *No children, elderly, banyan trees or Arraigns have been harmed in this sport.