that perfect white man 's ass , hairless , just starting to turn flabby and settle down on the backs of the thighs ; he had seen a thousand like it in the various locker rooms where he had dressed and showered , was developing one himself ( or had been until the guy had run him over , changing the physical configuration of his backside perhaps forever ) , only he had never seen one like mccarthy 's was now , one that looked like something inside had fired a flare or a shotgun shell in order to - ? to what ?