Police are appealing for information after two cars were seen ramming each other during a chase outside Asda Queslett in Great Barr.
A video from an onlooker shows a silver Citroen Berlingo being driven at speed up the entrance road to the supermarket.
The people carrier, which has the rear passenger door open, takes asharp right and ploughs over a raised kerb, cutting into the lanewhich leads back onto the main road.
The Citroen is then seen ramming into a red Seat Leon which hadalready pulled out onto Queslett Road.
A group of young men from the Seat are then seen running back up the entrance to Asda, while the Citroen has now been driven to the oppositebusy carriageway.
One man, dressed in a white top, leaves the car and appears to have been injured as he limps clutching his leg.
The video shows the two men from the Citroen look at the injured man,and then jump back in the car.
West Midlands Police said officers were called to reports of disorderat 9pm on Wednesday, June 3 and appealed for information.