This happened in Bizerkley.
Fortunately, although Jason Meggs heavily edited the video before passing it to media orgs and YouTube, the Berkeley PD was not fooled, and is going to charge one of the cyclists with a crime. Meggs edited out the part of the vid that showed a cyclist CLIMBING ON THE HOOD OF THE VAN AND KICKING IN THE WINDSHIELD, but witnesses saw it.
If you want to watch the video, and discuss it, go here:
http://www.youtube.com/watch?v=bo4MpO3kBRE