Yes, it's caught me off guard a number of times. Dick.
As far as the video goes I think everything was handled extremely professionally. How many times must one ask to, 'put your hands behind your back'.
I may not be an officer like DragKnee but always been a goal. With a year and a half of law enforcement classes under my belt it seems from all the videos, as they are resisting is the time they start yelling about how they aren't or how they aren't doing anything. Classic and very well handled. I may be no expert nor am I in the field everyday but that's just my .02.