I think the comments are what they are, a case of a police officer deriding joy out of apprehending a fleeing criminal that was trying to evade due process. Was it a black man, yes, but watch Cops and there are just as many trailer trash whites taken down with similar force. Ever listen to the audio of that, most the officers are full of either an adrenaline rush, if not winded after the chase and take down. The process of handcuffing that criminal isn't a gentle process either. When someone is lying on their stomach and not resisting after a take down, kneeing them in the back and grabbing their arms and handcuffing in my opinion is a bit excessive, yet it happens in virtually all the footage I've seen. But let's face it, often times the criminal is still resisting so some force is necessary to make the whole process happen as quickly as possible without exposing officers to harm. You never know what happens it's fight or flight, people are like animals and when they get to a point where fleeing isn't working, they will posture to fight when cornered, whether it was advisable or they even put up a good stand is irrelevant, they did offer their last act of defiance.