John sends this story about Critical Mass, a monthly bicycle ride in San Francisco. Yesterday's was unusually large, and had thousands of riders. A lot of motorists complain because they don't think that bicycles belong on the road. A lot of people think that the ride is some sort of protest, and that the cyclists are deliberately blocking traffic in order to make some sort of political point. But it is really not. They are just bicycle enthusiasts who want to ride on the streets safely and with other bicyclists. Riding a bicycle on streets full of other cyclists is a lot more enjoyable that trying to ride on streets dominated by motorists.