Plot hole: When John finally gets his motorbike started and drives frantically through the mall car park with the T-1000 in pursuit, he presents a clear target on at least four occasions. Why doesn't the T-1000 just draw his gun and shoot him? Don't tell me he's worried about hitting a bystander - he kills lots of innocent people, and he uses his gun many, many times during the film - it isn't something he doesn't know how to do. He can't be worried about making a spectacle of himself and blowing his cover, either - driving a truck into a sewer will do that, every time, quite apart from the fact that as far as anyone is concerned he is an armed cop shooting a fleeing suspect who may have been part of the furious gunfight that just took place. He could have emptied the gun into John's back, mission complete.