The lethal pneumatic ping pong gun. This thing isn't exactly wife approved. Creator Ron Kessinger built this mighty powerful ping pong launcher - "a variation on a potato cannon, built to run on compressed air and much tighter tolerances."
Here's how it works:
"By pushing one of the two trigger buttons, you charge the 14 shot magazine that runs on the left side of the barrel and load a round into the cylinder. By pushing the second trigger once you begin to pressurize the gun, and by pushing it a second time you release all of the air through the mass relief valve, and then whatever is in front of the gun disappears!"
Check out the gun/damage done/specs. Scroll all the way down for a video gallery of this bad boy in action.