A motorcyclist has been rammed by an unmarked police car at a busy Mandurah intersection.
Dashcam footage captured the moment at the traffic lights near the Mandurah Train Station.
The police car is seen sharply turning a red light around 12.30pm on Tuesday, before taking down the motorbike.
The rider then gets to his feet and scrambles backwards with his hands in the air, before being arrested.
"He bailed off straight away and the cop went pretty hard at him," witness Terry Johnson told 9News.
It is believed the same motorbike was speeding through Erskine earlier that day.
The 24-year-old is facing possible drug and traffic charges.
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