Christopher Moran, whose son was friends with Mr Hicks, 18, said there was "hardly any traffic" when the van he was driving was overtaken by a moped, followed by the first of two unmarked police cars which he said he believed were travelling at around 60-70mph on Caledonian Road.
Four to five seconds later the first of two unmarked police cars with blue flashing lights "flew past" his white Toyota van, he said.
"My van actually rocked, the speed they were going, it made me nervous," he told coroner Mary Hassell.
"I thought it was my son driving and I got extremely nervous.
"I was so nervous, so I chased the police in my van.As you do...
"The inquest also heard from driver Raitis Liepins, who described the moment Mr Hicks flew off his moped and collided with his dark blue Saab after swerving onto the wrong side of the road on Wheelwright Street.
He said the moped made a "really sharp movement" as it attempted to overtake a vehicle, which could have been caused by the driver losing control when trying to brake.
Then, Mr Liepins said, the moped fell sideways and Mr Hicks "hit my car with his body", leaving blood on the road.
It took five or six seconds from when he first saw blue flashing lights for the police cars to arrive at the accident scene, the court heard.Another Darwin Award handed out.