A drunken yob who killed a 71-year-old man in an unprovoked attack has been jailed for seven years.
James O'Donoghue, 21, took a running jump at John Shilling, knocking him over, and stamping on his head several times, the Old Bailey heard.
Before attacking Mr Shilling in West Hampstead, north-west London, in March 2004, O'Donoghue said to two boys "watch this".
O'Donoghue was found guilty of grievous bodily harm with intent on Tuesday.
Judge Jeremy Roberts said there were "few more wicked crimes" than this.
"The public are thoroughly fed up with this type of meaningless violence which goes on in the streets.
"Self-induced drunkenness is no excuse," he said.
Mr Shilling was walking along Belsize Road when he was set upon by O'Donoghue, known as Ginger.
Mr Shilling died three months later from complications caused by a head injury, said Sally Howes QC, prosecuting.
Miss Howes said O'Donoghue, who was 19 at the time, boasted to two boys: "Watch this. I am going to beat up this old man."