Vortex Cannon! - Bang Goes the Theory Preview - BBC OneSubscribe and 🔔 to the BBC 👉 https://bit.ly/BBCYouTubeSub Watch the BBC first on iPlayer 👉 https://bbc.in/iPlayer-Home http://www.bbc.co.uk/bang Jem Stansfield builds a vortex cannon to blow a house of bricks over. More about this episode: http://www.bbc.co.uk/programmes/b00ly58z #bbc All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes ma
