That whole situation is completely fucked. The guy totally 'forgot' his training. If you are concerned the person is going to reach for something you do not ask them to get their drivers license until you've either called for back-up, or are in a position of cover. And for that matter, detain the individual first, then ask where the drivers license or whatever else you want may be, etc. This is all because the person is outside of the vehicle during the stop.
You don't shoot someone when asking for their information at the persons window just because they reached for their glove box?
The officer should have told the man to get back into the car and place his hands outside of the window while he approached, or had him turn around and walk backwards towards the officer.