Al was on his roof Tuesday morning, broom in hand, sweeping. Al, my across-the-street neighbor, is hardly a spring chicken. He should not be climbing ladders. He especially should not be climbing a ladder onto his roof because it is the kind of roof a child draws, a steep upside down V. But there he was climbing, then crawling like a crayfish, standing intermittently to out-out-damn-spot, some spot only he could see. Who, in his right mind, sweeps his roof?