I wanted a unique way to toss the garter at our wedding. I thought about rubber band style guns, but didn't have the time to build one. A pneumatic cannon was a quick, simple, and fun solution! WARNING: This project has the potential to hurt you and others. Do not point the gun at anyone directly. Do not load heavy projectiles. Do not over pressurize the gun or it could fragment sending you and others to the hospital or graveyard. Use with brain engaged.