I didn’t see a threat from the driver but I wasn't there. Whether he needed to taz him or not I don’t know. I do think that the officer put them both in danger though. First he was almost standing in traffic. Around here they make you pull further over or go to the passenger side. Then he let him fall and lay in the road awhile. Then he left him in the road and the guy got up and was staggering around. He’s lucky that a distracted drive didn’t swerve over, IMO.
The doofus was the guy in traffic, not the cop.
Had he submitted to a lawful order, he would have been in front of the police car and not the tazer.
The real threat was from a suspect who wouldn’t comply with the cop’s orders. That is the first signal of an impending threat. From there, the cop’s gonna take control of the situation before it takes control of him.