The copper has had a total and utter loss of control. The red mist has descended.
He’s properly shoed the lad on the floor (who appears to have been lucky to escape serious injury) & then set about the bloke sat down who appears to be doing nothing more threatening than sitting down with his hands in the air, as he was being instructed to do.
It’s a miracle that no one has been shot, because that’s the direction that the whole thing was spiralling towards.
GMP will be paying out a wedge to settle this.