A one-armed “angry” attacker who punched a man trying to break up a fight was caught on CCTV.
Brett Coole’s victim suffered a broken collar bone and had to have a torn ear glued back onto his head.
Coole, who lost his left arm when he was a youngster and has previous convictions for robbery, has been jailed for a year for the unprovoked attack.
When he punched a man outside the King’s Arms pub in Kingswood, Jamie Thomas intervened and Coole turned on him.
Coole, 24, of no fixed address, pleaded guilty to wounding in June last year, the Bristol Post reports.
At Bristol Crown Court , judge Julian Lambert told him: “I don’t know what eats you up and makes you the angry man you are.
“What is for certain is there was no need to beat the man in the way that you did.
“You turned on a young man who was trying to break up a fight. You wounded him.”
Susan Cavender, prosecuting, said Coole hit a man outside the pub – which was captured on CCTV but not the subject of any charge.
When Jamie Thomas intervened, which was not caught on film, Coole assaulted him.
Ms Cavender said: “Mr Thomas tried to break up the fight.
“He has very little memory of what happened.
“He saw someone he recognised backing away and the next thing he remembers is being back in the pub.”
A witness described seeing Mr Thomas next to a one-armed man who knocked him to the ground in an unprovoked attack.
Coole had 15 previous court appearances for 22 offences, including disorder, anti-social behaviour and robbery.
Nicholas Clough, defending, said his client got word someone had been bad-mouthing him and Coole found him and hit him.
When Mr Thomas attempted to get in between them, Coole hit him.
Mr Clough said: “In days he knew the police were looking for him and so he handed himself in.”
Coole was remorseful for the single blow on Mr Thomas, the court heard.