From the look on Harry's face he hadn't thought of that.
"And more importantly," she said, "you should have simply sat in Professor Snape's class. And watched. And left at the end of class. As you would have done if you had not possessed a Time-Turner. There are some students who cannot be entrusted with Time-Turners, Mr. Potter. You are one of them. I am sorry."
"But I need it!" Harry blurted. "What if there are Slytherins threatening me and I have to escape? It keeps me safe -"
"Every other student in this castle runs the same risk, and I assure you that they survive. No student has died in this castle for fifty years. Mr. Potter, you will hand over your Time-Turner and do so now."
Harry's face twisted in agony, but he drew out the Time-Turner from under his robes and gave it to her.
From her desk, Minerva drew out one of the protective shells that had been sent to Hogwarts. She snapped the cover into place around the Time-Turner's turning hourglass, and then she laid her wand on the cover to complete the enchantment.
"This isn't fair!" Harry shrieked. "I saved half of Hogwarts from Professor Snape today, is it right that I be punished for it? I saw the look on your face, you hated what he was doing!"
Minerva didn't speak for a few moments. She was enchanting.
When she finished and looked up, she knew that her face was stern. Maybe it was the wrong thing to do. And then again maybe it was the right thing to do. There was an obstinate child in front of her, and that didn't mean the universe was broken.
"Fair, Mr. Potter?" she snapped. "I have had to file two reports with the Ministry on public use of a Time-Turner in two successive days! Be extremely grateful you were allowed to retain the Time-Turner even in restricted form! The Headmaster made a Floo call to plead with them personally and if you were not the Boy-Who-Lived even that would not have sufficed!"
Harry gaped at her.
She knew that he was seeing the angry face of Professor McGonagall.
Harry's eyes filled up with tears.
"I'm, sorry," he whispered, voice now choked and broken. "I'm sorry, to have, disappointed you..."
"I'm sorry too, Mr. Potter," she said sternly, and handed him the newly restricted Time-Turner. "You may go."
Harry turned and fled from her office, sobbing. She heard his feet pattering away down the hall, and then the sound cut off as the door swung closed.
"I'm sorry too, Harry," she whispered to the quiet room. "I'm sorry too."
Fifteen minutes into lunch hour.
No one was speaking to Harry. Some of the Ravenclaws were shooting him looks of anger, others of sympathy, a few of the youngest students even had looks of admiration, but no one was talking to him. Even Hermione hadn't tried to come over.
Fred and George had gingerly stepped near. They hadn't said anything. The offer was clear, and its optionality. Harry had told them that he would come over when dessert started, no earlier. They had nodded and quickly walked away.
It was probably the utterly expressionless look on Harry's face that was doing it.
The others probably thought he was controlling anger, or dismay. They knew, because they'd seen Flitwick come and get him, that he'd been called to the Headmaster's office.
Harry was trying not to smile, because if he smiled, he would start laughing, and if he started laughing, he wouldn't stop until the nice people in white jackets came to haul him away.
It was too much. It was just all too much. Harry had almost gone over to the Dark Side, his dark side had done things that seemed in retrospect insane, his dark side had won an impossible victory that might have been real and might have been a pure whim of a crazy Headmaster, his dark side had protected his friends. He just couldn't handle it any more. He needed Fawkes to sing to him again. He needed to use the Time-Turner to go off and take a quiet hour to recover but that wasn't an option any more and the loss was like a hole in his existence but he couldn't think about that because then he might start laughing.
Twenty minutes. All the students who were going to eat lunch had arrived, almost none had departed.
The tapping of a spoon rang through the Great Hall.
"If I may have your attention please," Dumbledore said. "Harry Potter has something he would like to share with us."
Harry took a deep breath and got up. He walked over to the Head Table, with every eye staring at him.
Harry turned and looked out at the four tables.
It was becoming harder and harder not to smile, but Harry kept his face expressionless as he spoke his brief and memorized speech.
"The truth is sacred," Harry said tonelessly. "One of my most treasured possessions is a button which reads 'Speak the truth, even if your voice trembles'. This, then, is the truth. Remember that. I am not saying it because I am being forced to say it, I am saying it because it is true. What I did in Professor Snape's class was foolish, stupid, childish, and an inexcusable violation of the rules of Hogwarts. I disrupted the classroom and deprived my fellow students of their irreplaceable learning time. All because I failed to control my temper. I hope that not a single one of you will ever follow my example. I certainly intend to try never to follow it again."
Many of the students gazing at Harry now had solemn, unhappy looks upon their faces, such as one might see at a ceremony marking the loss of a fallen champion. At the younger parts of the Gryffindor table the look was almost universal.
Until Harry raised his hand.
He did not raise it high. That might have appeared preemptory. He certainly did not raise it toward Severus. Harry simply raised his hand to chest level, and softly snapped his fingers, a gesture that was seen more than heard. It was possible that most of the Head Table wouldn't see it at all.
This seeming gesture of defiance won sudden smiles from the younger students and Gryffindors, and coldly superior sneers from Slytherin, and frowns and worried looks from all others.
Harry kept his face expressionless. "Thank you," he said. "That's all."
"Thank you, Mr. Potter," said the Headmaster. "And now Professor Snape has something to share with us as well."
Severus smoothly stood up from his place at the Head Table. "It has been brought to my attention," he said, "that my own actions played a part in provoking the admittedly inexcusable anger of Mr. Potter, and in the ensuing discussion I realized that I had forgotten how easily injured are the feelings of the young and immature -"
There was the sound of many people emitting muffled chokes at the same time.
Severus continued as if he had not heard. "The Potions classroom is a dangerous place, and I still feel that strict discipline is necessary, but henceforth I will be more aware of the... emotional fragility... of students in their fourth year and younger. My deduction of points from Ravenclaw still stands, but I will revoke Mr. Potter's detention. Thank you."
There was a single clap from the direction of Gryffindor and faster than lightning Severus's wand was in his hand and "Quietus!" silenced the offender.
"I will still demand discipline and respect in all my classes," Severus said coldly, "and anyone who trifles with me will regret it."
He sat down.
"Thank you too!" Headmaster Dumbledore said cheerfully. "Carry on!"
And Harry, still expressionless, began to walk back to his seat in Ravenclaw.
There was an explosion of conversation. Two words were clearly identifiable in the beginning. The first was an initial "What -" beginning many different sentences such as "What just happened -" and "What the hell -" The second was "Scourgify!" as students cleaned up the dropped food and spit-out drinks from themselves, the tablecloth, and each other.