As a matter of fact I do. It's used at sporting events to fire blanks, and even though it fires blanks, blanks are still very dangerous. At medium range blanks can cause bruising or put out an eye. At closer ranges they can have similar penetrating power as a bullet. That's how Brandon Lee died. Nobody knew how dangerous blanks could be. For that reason, many jurisdictions consider them weapons.

Wait, why are we arguing about how much blanks are dangerous? This is prob the fastest off-topic I've seen you involved in.