NYPD (illegally) pwns Critical Mass rider

I'm not quite sure what possessed this police officer to take out this hapless protester, but you've got to admire his form and/or gross violation of civil rights:

Shocking. This savage hipcheck took place at a Critical Mass protest in Time Square. Now, CM riders can be annoying. I'm all for cycling advocacy, but inconveniencing the people you're trying to convince is never a good strategy. But still. Nobody deserves that kind of assault. I hope that jackass gets fired or suspended or kicked by every cyclist that passes him for the rest of his life..