[Gogar]

The driver was being a *****, but HELL YES, that's excessive.

I think the officer kind of overestimated the 'threat level', that's all. And why did he pull him out of the car in the first place?

Check out the officer's body language in his shoulders in the first 20 seconds of the tape. You can see it coming.

edit: And NO, the man was not innocent at all. He was being an a-hole and the first words out of his mouth were an admission of speeding. Take the ticket like a man, and go on your way.

But the gap between "a-hole" and "tazer" should be a little bigger than that example.