Harry Potter and the Methods of Rationality

'He's got no right to not like it -

'- not after the prank he played on -'

'- Neville Longbottom, his name was -'

'- he's as fair a fair target now as fair can be.'

'All right. Just make sure you don't forget your parts.'

'We've rehearsed it often enough -'

'- over the last three hours.'

And Minerva McGonagall, from where she stood at the speaker's podium of the Head Table, looked down at the next name on her list. Please don't let him be a Gryffindor please don't let him be a Gryffindor OH PLEASE don't let him be a Gryffindor... She took a deep breath, and called:

'Potter, Harry!'

There was a sudden silence in the hall as all whispered conversation stopped.

A silence broken by a horrible buzzing noise that modulated and changed in hideous mockery of musical melody.

Minerva's head jerked around, shocked, and identified the buzzing noise as coming from the Gryffindor direction, where They were standing on top of the table blowing into some kind of tiny devices held against Their lips. Her hand started to drop to her wand, to Silencio the lot of Them, but another sound stopped her.

Dumbledore was chuckling.

Minerva's eyes went back to Harry Potter, who had only just started to step out of line before he'd stumbled and halted.

Then the young boy began to walk again, moving his legs in odd sweeping motions, and waving his arms back and forth and snapping his fingers, in synchrony with Their music.

To the tune of 'Ghostbusters'

(As performed on the kazoo by Fred and George Weasley,

and sung by Lee Jordan.)

.

There's a Dark Lord near?

Got no need to fear

Who you gonna call?

'HARRY POTTER!' shouted Lee Jordan, and the Weasley twins performed a triumphant chorus.

With a Killing Curse?

Well it could be worse.

Who you gonna call?

'HARRY POTTER!' There were a lot more voices shouting it this time.

The Weasley Horrors went off into an extended wailing, now accompanied by some of the older Muggleborns, who had produced their own tiny devices, Transfigured out of the school silverware no doubt. As their music reached its anticlimax, Harry Potter shouted:

I ain't afraid of Dark Lords!

There was cheering then, especially from the Gryffindor table, and more students produced their own antimusical instruments. The hideous buzzings redoubled in volume and built to another awful crescendo:

I ain't afraid of Dark Lords!

Minerva glanced to both sides of the Head Table, afraid to look but with all too good a notion of what she would see.

Trelawney frantically fanning herself, Flitwick looking on with curiosity, Hagrid clapping along to the music, Sprout looking severe, and Quirrell gazing at the boy with sardonic amusement. Directly to her left, Dumbledore humming along; and directly to her right, Snape gripping his empty wine goblet, white-knuckled, so hard that the thick silver was slowly deforming.

Dark robes and a mask?

Impossible task?

Who you gonna call?

HARRY POTTER!

Giant Fire-Ape?

Old bat in a cape?

Who you gonna call?

HARRY POTTER!

Minerva's lips set in a white line. She would have words with Them about that last verse, if They thought she was powerless because it was the first day of school and Gryffindor had no points to take away. If They didn't care about detentions then she would find something else.

Then, with a sudden gasp of horror, she looked in Snape's direction, surely he realised the Potter boy must have no idea who that was talking about -

Snape's face had gone beyond rage into a kind of pleasant indifference. A faint smile played about his lips. He was looking in the direction of Harry Potter, not the Gryffindor table, and his hands held the crumpled remains of a former wine goblet...

And Harry walked forwards, sweeping his arms and legs through the motions of the Ghostbusters dance, keeping a smile on his face. It was a great setup, had caught him completely by surprise. The least he could do was play along and not ruin it all.

Everyone was cheering him. It made him feel all warm inside and sort of awful at the same time.