A BBC Scotland journalist has told a court he saw a man left with blood pouring from his ear after the alleged victim was attacked on Old Firm day.
Mike Farrell, who works as a reporter with the broadcaster, said he witnessed the incident while he was going to the shops to buy beer after the Scottish Premiership clash.
He said the alleged victim's skull made a noise like a wet football hitting the ground when it smacked off the concrete in Renfrew, near Glasgow.
He said he was so worried about what he'd witnessed he feared the man may die, so immediately called 999.
And he said he was so shaken up by what he'd seen he couldn't drink any of the beers when he got home.
The 33-year-old was giving evidence at the Paisley Sheriff Court trial of Scott Gethins, 54.
Gethins, of Renfrew, denies carrying out two assaults in the Renfrewshire town's High Street on March 31, 2019.
Prosecutors claim he left Derek Robertson badly injured and permanently impaired by repeatedly punching him on the head, causing him to fall to the ground.
And he is said to have also assaulted Lesley Ann Robertson, to her severe injury, by punching her on the head, causing her to fall to the ground.
Mr Farrell was the first witness called to give evidence in the case, telling the court he worked as a journalist on radio and TV programmes for BBC Scotland.
He said: " Celtic and Rangers had been playing earlier in the day.
"I had been at home with my wife and son, who was nine or ten months old at the time.
"At night I went out to the shops."
He said he saw "a bit of argy bargy" between a man and a driver at a set of traffic lights, after the pedestrian ran in front of the driver's car when it was a green light.
He said he then saw the pedestrian and another man "squaring up to each other" and added: "The man I saw earlier threw the first punch.
The other guy swung for the man. I don't think either of them connected. If they did, it wasn't clear, there was no clean contact.
"They both kinda stumbled and both ended up on the floor."
He said he then saw Gethins punching the other man in the face - and knocking him out.
He explained: "You could tell instantly that the man was unconscious - he was out cold before he hit the floor.
"When his head hit the pavement it sounded really kinda dull and wet, like a really old waterlogged football kinda thud on the ground.
"I thought, 'this guy could be a goner'. I thought, 'this guy could be dead'. Blood started coming out of one of his ears.
"I had my phone out and was dialling 999. There was a pool of blood coming out of his ear on the floor.
"I was going to the shop to get some beers and I remember, by the time I got home, I didn't have any - I was that shaken up by it."
He dismissed claims from solicitor Michael Poggi, defending Gethins, that the woman he saw had "kicked and punched" Gethins first, before he punched the man.
He said: "That's not how I remember it, no. I am crystal clear on some elements, but obviously it's been a fair amount of time since."
And he said he did not remember "any sectarian language, such as 'Fenian'" being used.
Gethins maintains his innocence and the trial, before Sheriff Bruce Erroch QC, continues.
