in this short video I'm going to show you how to pop a plastic soda bottle first drill a 1/2 inch hole in the soda bottle cap and then insert a tire inflation valve stem you can buy these valve stems in any Walmart home-improvement or hardware store for just a few dollars screw the top securely back on to the empty soda bottle then hook a bike pump or air compressor to it and begin inflating the bottle inflate the bottle until it reaches a hundred and ten to 120 psi notice how the bottom of the bottle is beginning to expand but come more rounded due to the internal pressure when you're ready leave the pump attached to the bottle so you can recover the valve stem then shoot it with a BB gun or pellet rifle it's loud so warn your neighbors beforehand or do it in remote areas away from people