On Fourth Street, the black bloc picks up momentum. Mounted police loop around and head up one group. Police and protesters intermingle. Horses begin to get nervous. Protesters fall into an impromptu sit-in in front of police barricades.
Officers have a protester on the ground.
Other protesters shout for people to photograph the arrest, which features a couple of extra punches as the suspect lies on his stomach. Halfway to Third Street, they are met with three canisters of mace from police. People run in all directions. Cars heading north on Elm Street are stuck in the confusion. Mace canisters land between vehicles, and protesters lob them back at police.