Andy Marmery finds out what happens when he heats up a glass bauble filled with a tiny amount of water. The results are, predictably, explosive. However, shooting the experiment at 18,000 and then 34,000 frames per second with a Phantom v1610 camera reveals the shattering forces at work. EXPLORE THE RI ADVENT CALENDAR: rigb.org.uk/advent With thanks to BBSRC: bbsrc.ac.uk/ Don't miss the 2013 CHRISTMAS LECTURES on BBC Four, BBC iPlayer and the Ri Channel: rigb.org/christmas-lectures The Ri is on Twitter: twitter.com/ri_science and Facebook: www.facebook.com/royalinstitution Subscribe for the latest science videos: richannel.org/newsletter