Prisoner of Azkaban: Gryffindor versus Ravenclaw

Harry didn't say anything. He took a deep breath as relief seeped through him; he had been sure for a moment that those eyes had belonged to the Grim. They set off for the castle once more. slightly ashamed of his moment of panic, Harry didn't say anything to Ron -- nor did he look left or right until they had reached the well-lit entrance hall.

Harry went down to breakfast the next morning with the rest of the boys in his dormitory, all of whom seemed to think the Firebolt deserved a sort of guard of honor. As Harry entered the Great Hall, heads turned in the direction of the Firebolt, and there was a good deal of excited muttering. Harry saw, with enormous satisfaction, that the Slytherin team were all looking thunderstruck.

"Did you see his face?" said Ron gleefully, looking back at Malfoy. "He can't believe it! This is brilliant!"