A video has been released which shows the perfect textbook armed stop during a high-speed chase.
Armed officers smashed into the car while it was still moving with a riffle and then dragged the teenage driver from behind the wheel.
Officers arrested two boys aged 15 and two boys aged 14 after cops chased them 10 miles through the streets of London and Essex following a knifepoint robbery.
The footage which was uploaded to Facebook shows the end of the chase whereby two police officers are attempting to get a stinger out and are nearly hit by the Audi which continues to smash into another car in an attempt to avoid arrest.
Suddenly armed officers swoop in and end the chase by surrounding the car with their guns raised.
Two 15-year-old boys were arrested on suspicion of aggravated taking and driving away of a vehicle.
The first, named only as “A” was also arrested on suspicion of possession of an offensive weapon, while “B” was further arrested on suspicion of robbery.
Two 14-year-old girls were arrested on suspicion of possession of a bladed article and allowing themselves to be carried in a vehicle without the owner’s consent.
In the footage, one suspect is seen being dragged from the motor after police smashed a side window.
Firearms cops trained their weapons on the man and screamed “get on the floor” before he was forced on to the ground and taken into custody.
The car had left a trail of destruction in its bid to escape after smashing into a number of other vehicles.
Police say the chase ensued after they tried to pull over a car in the Enfield area of North London over an ongoing investigation into an alleged knife robbery.
A Met Police spokesman said: “At approximately 9.25am on Saturday, officers attempted to stop a car in the Enfield area in connection with an ongoing investigation into a knife-point robbery.
“The vehicle failed to stop for police. A pursuit was authorised with the support of the National Police Air Service.