"What. Happened?" Snape said very quietly, the fury in his soft, cold voice making the hairs along Harry’s arm stand on end. Harry gulped, and cast around desperately for something to say, but came up blank, "I shall not ask you a second time, Potter," he said dangerously, "Between our last meeting, and now -  what happened?" Harry opened his mouth, but no sound came out. Snape hissed between his teeth, "Is this a game to you, Potter?" he asked harshly, "Well?  Is it?" he promoted again when Harry said nothing.