Police said a stolen car was seen at 9am but the driver, believed to be Haumia Manuel (35), drove through a red light and disappeared.
The fleeing car then crashed into another vehicle at the intersection of St Lukes Rd and New North Rd and the driver ran off down a line of traffic - testing doors of cars as he went.
He managed to get one car door open and dragged the driver out.
The man then fled in the stolen car, which was later found dumped outside a home in Harrington Rd, Henderson.
Numerous police, including dog handlers, are now swarming the area.
Inspector Jason Greenhalgh said the owner of the car was shaken and suffered cuts and bruises but did not need to go to hospital.
Greenhalgh said Manuel was dangerous and should not be approached.
Anyone who sees him should call 111.
