A 19-year-old was seen on CCTV punching another man to the back of the head, although the defendant himself said he could not remember the punch.
Callum James Taylor, of Cheveley Park, Grantham, pleaded guilty to using threatening, abusive or insulting words or behaviour against another man on May 24.
He was charged with the public order offence after the altercation was captured on CCTV at around 3am in the Market Place.
Taylor was arrested nearby and during interview admitted that he had gone out with friends at about 11am.
He said he had drunk about a quarter of a litre bottle of vodka, mixed with orange juice, coke and beer, as well as three pints of lager and two shots of sambuca.
Taylor told police that another group was shouting verbal abuse at a friend and that he had gone over to ‘sort it out’.
There was some pushing and shoving between the defendant and the complainant, which culminated in Taylor’s punch to the back of the other man’s head. While he could remember other punches being thrown between them, Taylor told officers that he couldn’t remember delivering this final blow.
Simon Cobb, defending, said that his client acknowledged that he had issues with anger management, and had been taking steps to address this.
The case was adjourned until July 20 so that a pre-sentence report can be prepared by the Probation Service, with Taylor remaining on unconditional bail.