The man – wearing a balaclava – suffered serious head injuries after being thrown into the air and flung 15 metres along the pavement.
His three accomplices are then seen on film trying to drag him into a waiting getaway car – but they quickly give up when he proves too heavy to lift and decide to save their own skins.
Footage filmed on a home CCTV camera begins with man in a black tracksuit sprinting along the road.
He is apparently being pursued by a group of masked men wielding machetes and bats.
It is understood the hit and run driver was trying to save the man who was being chased.
As the first three men disappear from frame, a blue car is seen racing towards another who has fallen behind.
The vehicle continues to accelerate and rams into him, crushing the man against a parked car and throwing him into the air.
The force of the impact sends him skidding about 15 metres along the concrete, ripping his trousers down in the process.
His accomplices stop and turn around as the blue car speeds away – allowing the first man to escape.
They rush to help the fallen man and try dragging him into a black getaway car but are unable to move him more than a few inches.
One of the bungling raiders then removes his balaclava and panics when a female bystander gets a clear look at his face.
The getaway driver then hops out and the three men make a second attempt to pull the badly injured man into the car but they give up after just a few seconds.
They get back in the vehicle and flee, leaving their partner in crime unconscious at the side of the road as the witness urgently dials 999.
West Midlands Police is now appealing for information about the incident, which happened in Erdington, Birmingham, at around 1.30pm on Friday.
A spokesman for West Midlands Police said: "A man in his 20s has been taken to hospital in a serious condition with a head injury.
“The patient was immobilised at the scene and taken to hospital via land ambulance.
"An investigation is under way and anyone with information is asked to call police on 101, quoting 1235 of 17/8/2018."
Source: Read Full Article