Re: Control and Restraint
I haven't seen the video in question.
To speak generally though, about cases where police officers use excessive force in subduing someone. (Or in some infamous cases, in beating the snot out of someone for no obvious reason):
The officers in question seem to be acting out of fear and anger, maybe even out of hatred.
The officers' skill at controlling another person is not the real issue, imho, its their ability to control themselves that is lacking.