Smartest Brain
Premiership Player
Police are trained in the movement that the cop who fired the shot did. They are trained to take the gun from the side and shoot at the perp until they stop. Usually 3-6 shots. Accuracy and time taken to get to firing position are all trained.You can quite easily miss if someone lunges at you with a knife, or if someone accidentally hits you with a shopping trolley. I know I want a cop to be 110% sure that he's hitting his target before he even thinks about pulling his gun on Bourke St.
In this case they dance around like they are characters in Jesus Christ Superstar for 15 seconds before one cops finally fires a single shot in that exact movement they are trained in.