All those people believing in him and cheering him - Harry couldn't stand to let that be false. To flash and fade like so many other child prodigies. To be a disappointment. To fail to live up to his reputation as a symbol of the Light, never mind how he'd gotten it. He would absolutely, positively, no matter how long it took and even if it killed him, fulfill their expectations. And then go on to exceed those expectations, so that people wondered, looking back, that they had once asked so little of him.
And he shouted out the lie that he'd invented because it scanned well and the song called for it:
I ain't afraid of Dark Lords!
I ain't afraid of Dark Lords!
Harry took his last steps toward the Sorting Hat as the music ended. He swept a bow to the Order of Chaos at the Gryffindor table, and then turned and swept another bow to the other side of the hall, and waited for the applause and giggling to die away...
The offer to tell the whole plot to anyone who guessed what 'has never happened before' spurred a lot of interesting attempts. The first omake below is taken directly from my personal favorite answer, by Meteoricshipyards. The second is based on Kazuma's suggestion for what "has never happened before", the third on a combination of yoyoente and dougal74, the fourth on wolf550e's review of chapter 10. The one that starts with 'K', and the one just above that, are from DarkHeart81. The others are my own. Anyone who wants to pick up one of my own ideas and run with them, particularly the last one, is welcome to do so. And before I get 100 indignant complaints, yes, I am well aware that the legislative body of the UK is the House of Commons in Parliament.
...In the back of his mind, he wondered if the Sorting Hat was genuinely conscious in the sense of being aware of its own awareness, and if so, whether it was satisfied with only getting to talk to eleven-year-olds once per year. Its song had implied so: Oh, I'm the Sorting Hat and I'm okay, I sleep all year and I work one day...
When there was once more silence in the room, Harry sat on the stool and carefully placed onto his head the 800-year-old telepathic artefact of forgotten magic.
Thinking, just as hard as he could: Don't Sort me yet! I have questions I need to ask you! Have I ever been Obliviated? Did you Sort the Dark Lord when he was a child and can you tell me about his weaknesses? Can you tell me why I got the brother wand to the Dark Lord's? Is the Dark Lord's ghost bound to my scar and is that why I get so angry sometimes? Those are the most important questions, but if you've got another moment can you tell me anything about how to rediscover the lost magics that created you?
And the Sorting Hat answered, "No. Yes. No. No. Yes and no, next time don't ask double questions. No." and out loud, "RAVENCLAW!"
"Oh, dear. This has never happened before..."
What?
"I'm allergic to your hair shampoo -"
And then the Sorting Hat sneezed, with a mighty "A-CHOO!" that echoed around the Great Hall.
"Well!" Dumbledore cried jovially. "It seems Harry Potter has been sorted into the new House of Achoo! McGonagall, you can serve as the Head of House Achoo. You'd better hurry up on making arrangements for Achoo's curriculum and classes, tomorrow is the first day!"
"But, but, but," stammered McGonagall, her mind in nearly complete disarray, "who will be Head of House Gryffindor?" It was all she could think of, she had to stop this somehow...
Dumbledore put a finger to his cheek, looking thoughtful. "Snape."
Snape's screech of protest nearly drowned out McGonagall's, "Then who will be Head of Slytherin?"
"Hagrid."
Don't Sort me yet! I have questions I need to ask you! Have I ever been Obliviated? Did you Sort the Dark Lord when he was a child and can you tell me about his weaknesses? Can you tell me why I got the brother wand to the Dark Lord's? Is the Dark Lord's ghost bound to my scar and is that why I get so angry sometimes? Those are the most important questions, but if you've got another moment can you tell me anything about how to rediscover the lost magics that created you?
There was a brief pause.
Hello? Do I need to repeat the questions?
The Sorting Hat screamed, an awful high-pitched sound that echoed through the Great Hall and caused most of the students to clap their hands over their ears. With a desperate yowl, it leapt off Harry Potter's head and bounded across the floor, pushing itself along with its brim, and made it halfway to the Head Table before it exploded.
"SLYTHERIN!"
Seeing the look of horror on Harry Potter's face, Fred Weasley thought faster than he ever had in his life. In a single motion he whipped out his wand, whispered "Silencio!" and then "Changemyvoiceio!" and finally "Ventriliquo!"
"Just kidding!" said Fred Weasley. "GRYFFINDOR!"
"Oh, dear. This has never happened before..."
What?
"Ordinarily I would refer such questions to the Headmaster, who could ask me in turn, if he wished. But some of the information you've asked for is not only beyond your own user level, but beyond the Headmaster's."
How can I raise my user level?
"I'm afraid I am not allowed to answer that question at your current user level."
What options are available at my user level?
After that it didn't take long -
"ROOT!"
"Oh, dear. This has never happened before..."
What?
"I've had to tell students before that they were mothers - it would break your heart to know what I saw in their minds - but this is the first time I've ever had to tell someone they were a father."
WHAT?
"Draco Malfoy is carrying your baby."
WHAAAAAAAT?
"To repeat: Draco Malfoy is carrying your baby."
But we're only eleven -
"Actually, Draco is secretly thirteen years old."
B-b-but men can't get pregnant -
"And a girl under those clothes."
BUT WE'VE NEVER HAD SEX, YOU IDIOT!
"SHE OBLIVIATED YOU AFTER THE RAPE, MORON!"
Harry Potter fainted. His unconscious body fell off the stool with a dull thud.
"RAVENCLAW!" called out the Hat from where it lay on top of his head. That had been even funnier than its first idea.
"ELF!"
Huh? Harry remembered Draco mentioning a 'House Elf', but what was that exactly?
Judging by the appalled looks dawning on the faces around him, it wasn't anything good -
"PANCAKES!"
"REPRESENTATIVES!"
"Oh, dear. This has never happened before..."
What?
"I've never Sorted someone who was a reincarnation of Godric Gryffindor AND Salazar Slytherin AND Naruto."
"ATREIDES!"
"Fooled you again! HUFFLEPUFF! SLYTHERIN! HUFFLEPUFF!"