When I taught you at eight to ride a bicycle, loping along beside you as you wobbled away on two round wheels, my own mouth rounding in surprise when you pulled ahead down the curved path of the park, I kept waiting for the thud of your crash as I sprinted to catch up, while you grew smaller, more breakable with distance, pumping, pumping for your life, screaming with laughter, the hair flapping behind you like a handkerchief waving goodbye.