A drunk roofer rained down punches and stamped on a man during a prolonged assault in a Northumberland pub.
Jordan Stappard was out in the Waterloo, in Blyth, when he got himself involved in a friend's family feud, which had "nothing to do with him".
Shocking CCTV footage showed the 27-year-old confront the male but then walk away.
Go here for the latest reports and live updates from North East courts
However, just minutes later, furious Stappard returned and launched an attack on the victim, whose was forced to cower in a corner while covering his head with hands, a court heard.
For five minutes, Stappard, who was on a community order at the time, punched and stamped on the man as others tried in vain to pull him away.
The thug, of Junction Close, in Blyth, did eventually stop and fled the scene but was tracked down by police and arrested soon after.
Now, he has been hit in the pocket after he pleaded guilty to one count of assault by beating at South East Northumberland Magistrates' Court and was fined £1,300.
Prosecutor, Niamh Reading, said the victim was in the Waterloo at around 4pm on February 12 this year when Stappard walked in.
"The defendant appeared to be under the influence of some form on intoxicant," Miss Reading continued. "He started having a go at [the victim].
"The situation did diffuse but, five or 10 minutes later, the defendant returned and started to have a go again.
"He became aggressive and said "I'm going to do you in"."
The court heard that Stappard then launched his five-minute attack on the victim, during which he was dragged to the floor as he was being punched and stamped on.
Fortunately, he only suffered a graze to his head and soreness to his lips, face and shoulders.
Miss Reading added: "This was a persistent and prolonged assault. The defendant returns to the victim numerous times and repeatedly attacked him."
Magistrates were told that Stappard, who has 20 offences on his record, was thoroughly ashamed on his actions and was "full of remorse".
Glenn Reardon, defending, said: "It was out of some misguided loyalty to his friend - he was sticking up for his friend and his mother.
"It was maybe not his place to get involved in their family dispute."
Stappard was also ordered to pay £150 compensation, £85 costs and a £133 victim surcharge.