BBC News Published image copyrightDamien Hammond image captionDamien Hammond is well known for walking around Nottingham dressed as the Joker from Batman A "prolific" criminal has been jailed for dropping a bowling ball on a council worker's head and giving him a brain injury. Damien Hammond, known for walking around Nottingham dressed as Batman's nemesis the Joker, had previously been convicted of 110 offences. In December 2019, he attacked a man who was collecting a television Hammond had left on the pavement outside his flat. The bowling ball fractured the man's skull and caused a brain haemorrhage. 'Volatile individual' Hammond, 31, of Strelley Road in Nottingham, was found guilty of causing grievous bodily harm with intent following a trial at Nottingham Crown Court.