This is the shocking moment a reveller punched a policeman so hard he needed facial reconstruction surgery to fix his broken jaw.
Demitre Clarke-Oliver, 24, viciously attacked PC Raymond Tse as he was opening the door of his police van after arresting a suspect at 3am in Oxford.
Footage shows him approach PC Tse from behind and grab him by the shoulder.
When the officer turned around, the thug lashed out, landing an enormous punch.
He then sprinted down the street until another officer caught up with him.
He tried to fight that officer as well but fell to the floor and was promptly cuffed.