Collan Rex, the former assistant water polo coach at the prestigious Parktown Boys’ High School, leaves the court. Picture: Itumeleng English/African News Agency (ANA)

Johannesburg - A former Parktown Boys High School learner on Thursday gave graphic evidence of an incident where former water polo coach Collan Rex allegedly molested him after a sport outing.

The boy, who was in Grade Nine at the time, told the High Court sitting at the Palm Ridge Magistrate's court that Rex had on numerous occasions attempted the act and succeeded that day.

"It was painful," the now 17-year-old said. He estimated that Rex attempted the act around eight times in 2016.

"I watched him 'dry hump' another boy on the bus on the same occasion. He also grabbed my balls (genitals) like he was trying to take my costume off during polo practice in the pool," he added, saying this occurred numerous times.

Earlier state prosecutor Arveena Persad called another 17-year-old boy in grade 11 at Parktown Boys.

He told the court that Rex choked him when he was in grade nine two years ago and grabbed his private parts.

"He would wrestle me and I would have to try fight him off. I didn't want to do it but I was forced," the boy said

The boy said a friend helped get Rex off him. He told the court about another incident where Rex tried to molest him.

The boy told defence lawyer William Robertse that Rex did not manage to penetrate him with his finger.

"He didn't get through my pants," he said.

When Robertse suggested to the boy that Rex did not intend to kill him in wrestling him, a common practice at the school, the teenager responded: "He choked me till I almost past out."

* Due to the graphic nature of the testimony and the age of the pupil, IOL has elected not to publish details of the incidents.

African News Agency/ANA