Flash mobs, Bay to Breakers, Idiotarod, and Alleycats...

What is it about our beloved cities that like to promote random gatherings? More reasons to wear costumes beyond Halloween? The subversiveness of thse grassroots organized affairs? The desire to create a community in the vast urban landscape? Whatever it is, it's pretty cool to see, even if the masses like me are too lame to participate participate. Here's the latest...