On my way to Critical Mass, London

DSC01986, originally uploaded by Craig Grobler.

Critical Mass is an event typically held on the last Friday of every month in cities around the world where bicyclists take to the streets en masse.

While the ride was originally founded with the idea of drawing attention to how unfriendly the city was to bicyclists, the leaderless structure of Critical Mass makes it impossible to assign it any one specific goal.