The officer reacted quickly and correctly, that dog closed the gap FAST. Great dynamic fight, how the attacker (dog) circled to attack again. The lesson is that a determined attacker is going to continue to attack until you change his channel to oh crap which the Taser did. Notice really how fast the whole incident lasted? 2 seconds maybe?
The only mistake I saw was that as the cop was walking down the street he was not watching the dog and was not able to react until the dog was upon him.
Awesome shot with the Taser.
My rifle and pistol are tools, I am the weapon.