Cop Beats Up Clown [VIDEO]

What would cause a cop to beat a clown? 

The clown tackled the cop!  The crazy brawl was luckily captured on video by a passerby, otherwise, who would believe this happening on a busy downtown street?  They say the clown is a local activist who protests in front of government buildings.  There were some complaints that the clown was chasing after cars with a squirt gun. How wacky is that? He was arrested outside city hall and charged with resisting arrest.