Darren Fresco, identified by witnesses as being with the runner on two occasions when a gun was fired in public, told North Gauteng High Court in Pretoria the gunshot was fired with "no warning" and made him flinch.

He said he asked Pistorius if he was " ******* mad". "He just laughed about what had happened. I felt as if my ear was bleeding," continued Mr Fresco.

The athlete's ex-girlfriend, Samantha Taylor, who gave evidence in the trial last week, was also in the vehicle, the court heard.

Pistorius earlier arrived at court as the trial entered its seventh day. He denies murdering his girlfriend Reeva Steenkamp on Valentine's Day last year.

Mr Fresco also recalled the occasion when Pistorius asked him to pass him his gun at a restaurant in Johannesburg on January 13 last year.

Pistorius takes his seat in the dock for the seventh day

He said he warned Pistorius his Glock pistol was "one-up" - that it had a bullet in the chamber - and that he thought he saw the runner remove it.

The gun went off under the table, followed by a "deafening hush" - and Pistorius "instantly" passed the weapon back to him and asked him to "take the rap for it".Mr Fresco told the court no one knew where the bullet had gone and that when the restaurant owner and his wife came over, "I repeatedly apologised about what happened, saying it had snagged on my shorts" and offered to pay for any damage.

Last week, professional boxer Kevin Lerena, one of several others dining with the Paralympic star, told the court of how he noticed blood on his toe after the gun went off and Pistorius apologised for the injury.

Earlier, the pathologist who conducted a post-mortem examination on Oscar Pistorius' girlfriend gave his evidence at the athlete's murder trial.

Pistorius vomited and retched in court as Professor Saayman gave graphic details of a post-mortem examination he carried out on the model during his first day of evidence.

Pistorius vomits into a bucket provided to him by court officials

A live broadcast of the trial was cut following a request from the prosecution on behalf of Professor Saayman - because his evidence was too "graphic".

Pathologist - Professor Gert Saayman

Prosecutor Gerrie Nel said the move was needed to "respect the decency" of Ms. Steenkamp and her family and friends.

However, Judge Matilda Masipa today ruled tweeting on the pathologist's testimony was allowed, which had been banned. Professor Saayman is being questioned by defence barrister Barry Roux.

Professor Saayman told the court Ms. Steenkamp was shot three times - in the head, hip and arm.