The young man thrust his hand between the closing doors of the subway car. Now his forearm was gripped tight by the black rubber gaskets. He made no effort to withdraw. His fingers clenched and curled as though they might summon the rest of his body through somehow. Then his hand wilted and dangled in midair. It was in the car and he was out. What would happen next? No one cared or even seemed to notice. But something was bound to happen. The doors opened again.