A 19-YEAR-OLD man has tearfully described how he begged the man accused of killing Rob Knox not to hurt him.

Karl Bishop is accused of murdering Mr Knox outside the Metro Bar, Station Road, Sidcup, and wounding five others with intent to cause GBH.

Mr Knox's parents Sally and Colin had to leave the Old Bailey courtroom several times today (Feb 16) as close friend Callum Turner described the events of May 24.

They also heard the accusation by defence counsel Ian Bourne that six friends, including Mr Knox's younger brother Jamie, were summoned to the bar by the Harry Potter star earlier that night to beat Bishop up.

Mr Turner, aged 19, who said he visited the bar nearly every weekend, had run up to the Metro Bar just before the stabbing to warn people, after ealier being threatened with a knife by Bishop.

He, Jamie and friend Nicky Lee Jones had encountered Bishop by the Tesco Express shop.

Mr Turner said: "He had two knives.

"He was holding one up at Nick and was also waving one about where Jamie was."

Bishop then approached Mr Turner's car and the witness said he was shouting: "You look like a big man. Come on big man, get out the car."

He said Bishop appeared to be treating the encounter as a joke and was waving one of his knives around inside the car.

Mr Turner told the court: "I've never ever felt so scared in my life."

He added: "I was begging him to leave me alone. I was begging him not to hurt me."

Mr Turner says Bishop then abruptly headed off to the Metro Bar and the witness raced off there to warn people.

He told the court: "I'm in hysterics. I'm crying, I'm shouting at the top of my voice."

But Mr Turner said the bouncers standing next to Bishop outside the bar just stared at him blankly.

Mr Turner said he was then joined by Mr Knox and they were both shouting together.

He said Mr Knox was getting angry, shouting: "How can you hold up knives to my brother?"

Mr Turner said Bishop then pulled the knives out and was shouting: "Come on then, who wants it?"

In a police statement, Mr Turner had said Bishop had looked "panicky" as he held the knives out.

It said: "His face looked like he was thinking 'what have I done?' and then it changed again and he was obviously thinking 'right, I've got the knives out'."

Mr Turner told the court: "To me it looked like he was just going to stab everybody."

Friend Andrew Dormer punched Bishop in the face and Mr Turner said as he did so, Bishop stabbed him in the chest, the court heard.

Mr Turner then picked up a chair and threw it at Bishop only to see it bounce off his shoulder.

And he said Mr Knox then smashed a bottle over Bishop's head to stop him stabbing another one of their friends, Dean Saunders.

Mr Knox then got the denfendant in a bear hug and tried to get him into the flowerbed but the witness said Bishop then stabbed his friend with both knives what looked like "hundreds" of times.

Several people jumped on Bishop, Mr Turner said, and he then comforted Mr Knox, who was now lying on the floor outside the Somerfield supermarket, until the police and ambulance arrived.

As Mr Turner comforted Mr Knox he told police he said: "You're a doughnut aren't you, getting involved in all this rubbish. It's not worth it is it Rob?"

Earlier in the evening a ginger-haired friend of Bishop started acting aggressively towards Mr Turner, asking him what his problem was.

Mr Turner said Bishop then turned his attention to friend Sammy Mehmet and the two began fighting.

Ian Bourne, for the defence, claimed Mr Turner, Jamie Knox, Sammy Mehmet and three others were summoned to the bar by Mr Knox to attack Bishop.

But Mr Turner said Mr Knox tried to split the fight up.

Mr Turner then chased Bishop's companion through Sidcup station before giving up.

Bishop, aged 21, of Beaver Lodge, Carlton Road, Sidcup, denies the charges.

The trial continues.