"I can't believe how windy it is today," said the woman in line at the pet store. "I know," said the cashier. Then, rolling her eyes and nodding meaningfully in my direction, she added, "and some people are riding their bikes." . . . After two weeks of riding my bicycle everywhere, I'd gotten used to people treating me as if I were somehow not right in the head. Store clerks ignored me, old men gave me the hard stare, soccer moms avoided eye contact. After all, almost nobody in America rides a bike if they can afford a car....