The officer followed the biker in an UNMARKED CAR, meaning it wasn’t a police car. How the hell would you react if a car just hit you outta nowhere?
People don’t understand that the anatomy of a cop’s body is very different from ours. Their feet have their own mind and are powered by a local generator. When they get “charged up” there’s nothing they can do to stop it. The same goes for their fingers. Their hands are also magnetized, so each time they raise them above their waist, the gun just jumps out of the holster into their hand.