[youtube=”http://www.youtube.com/watch?v=yEhtFYQ7dxM&feature=youtube_gdata”]
Dan Spangler built this propane combustion cannon and uses it to fire soda cans, tennis balls, and even a small camera across the backyard of MAKE HQ. This is an archived clip from Make: Live, which was originally broadcasted on 8/24/11. Go to https://makezine.com/​live/​ for information about the show, chat transcripts, and details on the next show.