A knot of people worked their way around an old man on hands and knees, patting the sidewalk. “Crazy,” said a man, pushing through. Someone said, “Shouldn’t someone call someone?” A small boy and his mother, holding hands, watched the man pat the pavement. The boy pulled away, squatted in front of the old man. “Look!” The boy pointed. The man felt about where the boy pointed and found the lens that has fallen from his eyeglasses. The man thanked the boy and, together, they fitted the lens back into the frame. They shook hands and each went his way.