I'm not exactly sure what happened, but I did see a bike that had been absolutely destroyed. The grapevine told me that an SUV had done this, dragging the bike for some ways. There didn't appear to be anything salvageable on the bike. The pedals had been snapped off the cranks, the fork and wheels were bent to hell, and the seat stays may have been broken, too. I do not think anyone was injured, though.
People had stopped in the middle of an intersection, and the cops (with some paddywagons) showed up. I stood on the sidewalk and saw at least one person get arrested. It was definately not a good situation.
It doesn't really have anything to do with chicago critical mass, but in the santa cruz critical mass tonight, some ****er in a big lifted truck ran over someone's bike while we were going thru an intersection and sped off. made me furious.