Shocking footage shows a thug smash a man in the skull with a hammer in a savage revenge attack.<br /><br />Abdul Wahab, 29, launched at the victim, in his 20s, as he was being served in a shop.<br /><br />CCTV shows Wahab moments before he battered the man who was in a store in <br />Stratford Road, Sparkhill, Birmingham, at 2pm on February 21.<br /><br />The victim suffered a brain bleed and swelling following the horrific six second attack.<br /><br />He has since been left with metal plates in his skull and jaw.<br /><br />Wahab fled the scene and footage shows him running through a park where he threw the hammer in a lake.<br /><br />He then raced to Heathrow Airport where he caught a plane to Abu Dhabi.<br /><br />He was arrested at the airport when he returned back to the UK on March 26.<br /><br />Wahab, of Birmingham, admitted grievous bodily harm with intent and possession of an offensive weapon, but was found guilty of attempted murder by a jury.<br /><br />He was jailed for 21 years at Birmingham Crown Court on October 25.<br /><br />Wahab refused to give evidence in court but comments he made to officers <br />suggested the attack was committed out of “revenge”.<br /><br />Detective Constable Sam Higginson said: “This was a brutal attack on a man in a shop in the middle of the day. <br /><br />“The man suffered serious head injuries including a bleed to the brain and had metal plates fitted in his skull. He was in hospital for more than a month.<br /><br />“Wahab then fled the country in a desperate bid to escape justice. Fortunately we arrested him on his return to the UK.”