Everything went black.

* * *

Draco stood up and leaned against his desk, gasping for breath. Harry had knocked the wind out of him. Fighting the ringing noise in his ears, he looked around. There was Harry — still looking like Draco — lying sprawled on the stone floor, blood pooling under his head. Draco looked away, suddenly afraid he was about to get in some real trouble, and saw Snape, struggling to restrain a frantic Ron and Hermione, who were fighting to get to him. As he watched, Hermione broke free and ran to him, seizing him by the sleeve of his robes. "Harry," she sobbed. "Are you all right?"

Draco just stared at her blankly. She thought he was Harry. He looked up, saw the stunned faces of the Gryffindors watching him, the scowls on the faces of the Slytherins. They all thought he was Harry.

Snape strode forward and peeled Hermione off him, shoving her aside. Draco could hear the buzzing as the other students yelled at Snape — the Slytherins were silent, but the Gryffindors were all shouting that Draco had punched Harry first.

Snape came oozing up to Draco and peered into his face. "Potter," he said. "Can you explain this to me?"

Draco opened his mouth to say, "I´m not Potter, the Polyjuice Potion isn´t working, it should have worn off by now and it hasn´t-" But what came out was, "I don´t know, Professor. He hit me first."

What happened after that was a bit of a blur for Draco. He was marched up to the hospital wing by Snape, who was carrying Harryś limp body, the sight of which gave Draco a queasy feeling whenever he looked at it. He kept feeling his own face, his hair, to see if he´d begun turning back into himself, but he hadn´t.

Nothing happened.

Madam Pomfrey was waiting for them; she instructed Snape to lay Harry down on a bed surrounded by curtains, into which she vanished. Draco wound up sitting in a hard chair across from Snape, who was staring at him, eyes glittering with malice.