You can't really believe that the cops just walked up and jumped on him without any sort of warning or conversation?
They'll have asked him to identify himself, and then when he does that they will then have told him that he's being arrested and what the charge is
Then they will ask him to place his hands behind his back to be handcuffed. That's the point where he will have started resisting and then they have had to wrestle him down to cuff him.
I'll bet any money that's how it went down.

