A man shot dead a stranger after a row broke out at a McDonald's restaurant in south London, the Old Bailey has heard.
The two men met for a "shoot-out" after being escorted outside the Brixton outlet by security guards early on 17 April, prosecutor Zoe Johnson said.
Jurors heard Horace Campbell was given a gun by Liam Douglas-O'Callaghan with which he then shot Devon Scarlett, 32.
Mr Campbell, 27, of Anerley, and Mr Douglas-O'Callaghan, 18, of Tulse Hill, both south London, deny murder.
'Filled with lead'
The court heard Mr Campbell and Mr Scarlett became involved in "someone else's argument" in a queue at McDonald's at about 06:30 BST.
Miss Johnson said: "You may think they were spoiling for a fight."
Outside Mr Scarlett was heard saying he had been shown disrespect, while Mr Campbell said Mr Scarlett was "going to be shot in the head", the court heard.
When people tried to intervene, Mr Campbell allegedly told them Mr Scarlett had been "too disrespectful and was going to be shot in the head" and would be "filled up with lead".
A woman had heard them agreeing to meet in the nearby street "effectively for a shoot-out", said Miss Johnson.
Mr Campbell allegedly called up a local youth to bring his "thing" or gun, she said.
After being given the gun by Mr Douglas-O'Callaghan, Mr Campbell followed Mr Scarlett into Marcus Garvey Way and fired three shots - two of which hit the victim, said Miss Johnson.
Mr Scarlett, of Croydon, who was born Raymond Mitchell, died a few hours later in hospital.
The trial continues.