Seems like common sense to me.That's OK I'll say it, the cop broke the law.
It was NOT proportional to the threat posed. It was a textbook case of excessive force. The cop went from 0 to total ******* in .25 seconds, without rationally assessing the situation. If that cop can't successfully establish control over a small, frail old man without grave bodily injury, then he has no business being a cop at all.
We don't need people who can't maintain a cool head under pressure out there with police powers. It's just that simple.