A doorman at Stringfellows nightclub was jailed for three years for killing a reveller who touched a lapdancer.
Marcus Marriott was found guilty earlier this month of the manslaughter of George MacDonald, aged 34 and from Warwickshire, whose head smashed on to the pavement outside the club as he was punched.
Marriott (33), of Chingford, east London, had been accused of losing his temper after being challenged by the 21-stone Mr MacDonald as he was thrown out of the club.
The former amateur boxer was cleared of murder in June last year, but faced a second Old Bailey trial when the jury could not agree on the manslaughter charge.
Judge Christopher Moss said Marriott had "a serious loss of control" during the incident in October, 2004.
He said: "You delivered a single, devastating blow. The image is shocking and sickening. The force used upon Mr MacDonald was wholly dis-proportionate to any threat."
Mr MacDonald's widow Tanya, who is understood to be considering civil action against the club, left court without commenting.
Marketing director Mr MacDonald, of Southam, died of head injuries following the attack.