An occasional siren wailed, mist billowed, shadows moved behind windows. After seeing the Post extra Bob understood why: this city of seven million lethal human creatures was stifled with fear. The beast of apocalypse prowled its streets. Ancient terrors were invoked. All was quiet. To Bob, slinking along hurt and cold and famished, it seemed absurd. In his present mood he would gladly have let a child kill him. Smelling Cindy so close had been too keen a sorrow. He could bear no more of this. As he paced the banks of the Hudson, he contemplated jumping from one of the ruined piers and bringing this whole bizarre experience to an end. The city around him could not have seemed more oppressive or unfriendly. He had ho way of explaining himself, not even in his own mind. His only thought was that ours is an age at the far limit of time, and it is at limits and extremes that the impossible can happen. Or maybe the mysterious fifth force that physicists speculate about had something to do with it.