A 1km long pipe snakes its way through the Royal Institution building in Mayfair, London. A team of volunteers helped to move the pipe in preparation for a groundbreaking chemistry experiment for the Christmas Lectures 2012. 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