Greg Locke, a machine designer and bass player, has created a self-playing rock band that is becoming an Internet sensation. "The Trons" took six months to build, and Locke lists The Velvet Underground and washing machines as their biggest influences. The band consists of Wiggy, the lead guitarist, Ham, on rhythm guitar, Swamp the drummer, and keyboard player Fifi. Along with their success on YouTube, The Trons have performed five live gigs in their hometown of Hamilton in New Zealand. I wonder what their groupies are like.

Keiko Wakabayshi, a 77-year-old Japanese grandmother and master of jujitsu, jojitso, kenjitso, judo, kendo and karate, has been hired by the Italian military to teach soldiers hand-to-hand combat and humility. Standing a mere 5ft tall she easily wipes the floor with the soldiers in the Folgore brigade, most of whom are over 6ft and a third her age. I hear her best move is forward, forward, heavy kick and you should watch out for her laser attack.