A prankster took a police car with its sirens blaring on a joyride around Krispy Kreme car park after cops left the keys in the ignition.
Footage shows the joker hop into the car before taking the marked vehicle for a spin.
The man can be heard shouting "I'm the new policeman" as he turns on the car's sirens.
Onlookers were left in hysterics at his bold antics, with one saying it was the "funniest thing I've ever seen".
The car had been left in the car park in Peterborough by two officers who were called to an incident nearby.