I saw the flyer at the bike shop. I have seen too many discussions of Critical Mass on other forums. For those not in the know, Critical Mass riders ride through cities on the major streets, usually at rush hour, blocking lanes and running lights. They claim they are trying to raise awareness but IMHO, all they do is tick drivers off and hurt our goal of sharing the road. I sincerely hope that this "event" does not occur or at least does not have enough riders to cause significant harm.