Courtesy WISN / CNN Newsource
"I pulled up to the stop-light on the corner of Water and Wells, and I kind of happened to look to my right because there was a little bit of movement of a police officer approaching this man kind of dressed as a clown, but you couldn't really tell. It was really weird," a witness who was identified as Mitch said.
The witness said he quickly decided to get out his cell phone and hit record.
"What's going through my head is a cop beating up a clown. How can I not capture this video and show it to all my friends?" the witness said.
Authorities said the clown is often spotted outside government buildings and is considered an activist.
Police wouldn't go on camera, but they said they've received several complaints that the clown chases cars with a squirt gun.
When police arrived to investigate, they said the clown resisted.
"The officer reached for him, and the next thing you know, they're on the ground, tussling and rolling around. The officer started punching him, and then another officer showed up, and it looked like they were about to arrest him. It was pretty funny," the witness said. "The clown was resisting, so the cop needed to do what he needed to do to make sure he was safe."
The witness said he just happened to be in the right place at the right time.
"It was funny to witness, probably not so fun for the clown, but as a spectator, it was pretty entertaining," the witness said.
The clown was arrested and faces charges of disorderly conduct and resisting arrest.