A man died after his skull was fractured during a fight over a slice of pizza, a court heard.
Christopher Noble, 26, of South Wootton went to a takeaway in King's Lynn and ordered pizza which he threw to a friend early on 6 May last year.
It landed on Bradley Baker, 31, from Suffolk, Norwich Crown Court heard.
The pair went to an alley and Mr Baker was felled by a single blow before dying in hospital. Mr Noble, a taxi driver, denies manslaughter.
Christopher Morgan, prosecuting, said the pair, who had been drinking, went to a place away from CCTV cameras for a "fist fight" and it lasted no more than two minutes.
Mr Noble, from South Wooton near King's Lynn, said Mr Baker, a building worker from Leiston, moved towards him but he had gone to the alley "simply to talk".
Mr Morgan said a post-mortem examination carried out by pathologist Dr Nat Cary revealed the cause of death was a severe head injury because of "a blunt force impact causing a skull fracture".
Mr Baker died the day after the fight in the Queen Elizabeth Hospital in King's Lynn.
Mr Noble claims he was punched and punched back in self defence.
Mr Morgan said: "We claim Noble went down there (to the alley) for a fist fight and he was happy to engage in the fight.
"He says he was acting in self-defence. If he was, the blow he delivered would not be unlawful but both were contemplating a fist fight, which is unlawful."
John Baldwin, 28, from Mansfield, Nottinghamshire, is also on trial charged with affray in connection with the fight and was said to be present when the punch was thrown.
The case continues.