“Do you remember me telling you we are practicing non-verbal spells, Potter?""Yes," said Harry stiffly."Yes, sir.""There's no need to call me "sir" Professor."The words had escaped him before he knew what he was saying.”

“I’m a teacher! A teacher, Potter! How dare yeh threaten ter break down my door!”“I’m sorry, sir,” said Harry, emphasizing the last word.Hagrid looked stunned. “Since when have yeh called me ‘sir’?” “Since when have you called me ‘Potter’?”

“Is it true that you shouted at Professor Umbridge?""Yes.""You called her a liar?""Yes.""You told her He Who Must Not Be Named is back?""Yes.""Have a biscuit, Potter.”

“Fifty?” Harry gasped.“Fifty points each,” said Professor McGonagall, breathing heavily.“Professor — please —”“You can’t —”“Don’t tell me what I can and can’t do, Potter. I’ve never been more ashamed of Gryffindor students.”

“This is your copy of Advanced Potion-Making, is it, Potter?”“Yes,” said Harry, still breathing hard.“You’re quite sure of that, are you, Potter?”“Yes,” said Harry, with a touch more defiance.“This is the copy of Advanced Potion-Making that you purchased from Flourish and Blotts?”“Yes,” said Harry firmly.“Then why,” asked Snape, “does it have the name ‘Roonil Wazlib’ written inside the front cover?”Harry’s heart missed a beat. “That’s my nickname,” he said.”

“Yes, Harry Potter!” said Dobby at once, his great eyes shining with excitement. “And if Dobby does it wrong, Dobby will throw himself off the topmost tower, Harry Potter!”“There won’t be any need for that,” said Harry hastily.”

“You haven’t given me any ink,” he said.“Oh, you won’t need ink,” said Professor Umbridge with the merest suggestion of a laugh in her voice.Harry placed the point of the quill on the paper and wrote: I must not tell lies. He let out a gasp of pain. The words had appeared on the parchment in what appeared to be shining red ink. At the same time, the words had appeared on the back of Harry’s right hand, cut into his skin as though traced there by a scalpel — yet even as he stared at the shining cut, the skin healed over again, leaving the place where it had been slightly redder than before but quite smooth.Harry looked around at Umbridge. She was watching him, her wide, toadlike mouth stretched in a smile.“Yes?”“Nothing,” said Harry quietly.”