Matthew Tosh, one of the UK’s leading pyrotechnicians, explains how fireworks and explosions are safely performed in a journey from fundamental combustion to the complex and visual effects seen around the world. Subscribe for more talks like this: http://bit.ly/RiSubscRibe How do we make gunpowder and launch fireworks in the air? How do they create the intricate patterns in the sky at firework displays or the bangs, whistles and crackles for sound effects? Matthew Tosh reveals the inner workings of a pyrotechnic extravaganza with fiery demos and explosive bangs. Matthew Tosh is a presenter, broadcaster and pyrotechnician. He’s built a reputation for bringing energy, enthusiasm and creative “spark” to events, live performances, television, radio and education projects. He is particularly well-known for his live event work involving fireworks and pyrotechnics all over the UK. Matthew has supervised fireworks as part of the London 2012 Torch Relay, as well as at many live orchestra concerts, awards ceremonies and, of course, Bonfire season displays. Subscribe for regular science videos: http://bit.ly/RiSubscRibe The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter