Ultimate Airzooka

Im sure a lot of you have heard about, or like myself - even own one. The airzooka, a bucket sized gadget with a gun-like handle and a simple rubber band loading mechanism shoots small pockets of air up to like 30 feet or something. Real jokes to play around with, cause its harmless, and totally spins out unaware victims - clueless as to what just hit em. Well what if a huge version of the airzooka were to be constructed? Like seriously massive - 20metres or so in diameter. One can only assume that the results would escalate accordingly. It would definately have to be made out of more hardcore and durable materials. The regular one is totally constructed in plastic....so a metal one? with super-tension rubber ropes, maybe even hydraulics. Im guessing the result of this monster would be quite devistating depending on the target - not such jokes anymore! As the ultimate airzooka essentially shoots out a mass of air at a high speed, so it wouldnt neccesarily have to be used to destroy, perhaps even bigger versions can be used to alter weather conditions. who knows, but i reckon this concept hold some potential. chillax with the fishbones yeah?