Cellphone video shot by witness Mitch Cooper shows the clown attacking a police officer.
"The clown was resisting so the cop needed to do what he needed to do to make sure he was safe," said Cooper who happened to be driving by. "It was funny to witness, probably not so fun for the clown, but as a spectator it was pretty entertaining."
According to a report, police had received several complaints prior to the brawl that the clown had been chasing cars with a squirt gun.
The clown is a well-known local activist who is often spotted protesting outside government buildings.
He was arrested for disorderly conduct and resisting arrest.