Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.
Victorian pudding: Before the Victorian times the christmas pudding was actual a staple of the British diet, it was a way of preserving meat, and was only became confectiony during Victorian times.