The officer probably did everything according to his department's protocol, except what his actions where after the word "Tazer" was mentioned.
We (state police), however, do not operate in this manner. However, if the man would have made the phone call first, he would have saved everyone a lot of grief, I am sure. It is common knowledge that when people are acting on high level stress, their thinking goes out the door, so the police must think for them. I am of the opinion that the reason he was being pulled over was for speeding or reckless driving? Once the young fellow identified his issue, he should have been allowed to reenter the vehicle and ordered to drive to the nearest hospital with the officer in pursuit with lights and siren on. The officer would have called his dispatcher requesting backup and also to alert the hospital. When backup arrived, one officer would have taken the lead while the second officer would have been the trail. Once at the hospital, they (the people inside the vehicle) would have been instructed to allow the female to exit and the male to stay in the vehicle with his hands on top of the steering wheel. Once the female would have been inside, the male would have been dealt with and then released. This is all according to our method of this type of situation.
I, too, get tired of trying to defend police officers that take it upon themselves to be the one in control using their own methods. It usually ends up bad. Just look at this mess.