What was the moment of no return when you understood you had stayed out too late and you had no way home having spent your last coin on the slots or in a bar or wagered on horses, and the sun was setting in a dirty yellow mist beyond the smokestacks and shifty faces peered out of the shadows at you and you walked quickly with pretended purpose, your heart in your mouth, striding as if you meant it although you had nowhere to go and the last bus left without you and you knew if you stopped moving that would be the end?