"Ughhh," Rainbow moans. "My wings are killing me!"

"What happened?" Fluttershy asks.

"Messed up a trick earlier today." Rainbow flexes her wings slowly, and grimaces at the shooting pain. "Turns out corkscrewing reverse loops don't really work."

"Well, that's obvious," Twilight interjects. "Angling your wings to receive lift for a rotation on your longitudinal axis while also keeping them at opposing angles to maintain a revolution around that axis is impossible, since –"

"Yeah, I know, Twi'. Lift and roll at the same time gives a barrel roll. I realised, mid loop and upside down."

"Ouch." Twilight frowned.

"Is it very bad?" Fluttershy asks quickly. Rainbow sees that she's worried, and gives her a reassuring smile.

"I'll manage. But I landed on my wings, so I'm stuck without flying for a day or two."

"Need a place to crash? I can fix up the guest room," Applejack offered.

"Yeah, thanks, AJ."

"Anything at all we others can do to help, you just let us know, okay? Maybe a spa visit for your aching body?"

"Thanks, Rarity, but I just need some rest. " Rainbow frowns at the word. Rest is almost as boring as the spa.

Pinkie gasps, loudly.

"I know what the best medicine is!" she exclaims.

The world stops.

Pinkie Pie knows what the best medicine is.

I know what the best medicine is! Cheerful.

The best medicine.

Hurting wings? Only wants to help.

Everything fades away except Pinkie Pie.

I know what the best medicine is. So thoughtful.

Pinkie Pie smiles at her.

I'll help. So nice.

She is growing larger.

You can trust me.

Twice Rainbow's height.

I only want what's best for you.

Pinkie is standing in a doorway, and she is looking down at Rainbow.

I know what the best medicine is.

Two wings are growing from her back.

Trust me.

Pinkie gives them a flap, then folds them on her back.

This will make it better.

The rest of the room is appearing.

This is what's best for you.

Bright-yellow walls, with Wonderbolt posters.

I know best.

This is Rainbow's room, in Cloudsdale.

I know the best medicine.

Pinkie is changing color.

This will make you understand.

Pinkie's body is blue, now.

Will make you learn.

Pinkie's hair is changing, too.

To be nice.

Less frizzy.

To be careful.

Wind-swept.

To not misbehave.

Rainbow-coloured, like hers.

To think ahead.

Pinkie's features grows thicker, more angular.

To do what you're told.

She's a stallion now.

This is for the best.

There is a broken vase at Rainbow's hooves.

You won't repeat those silly mistakes.

Pinkie's smile turns into a frown, and her eyes a hard yellow.

I'll make sure of it.

Her father steps into her room. He closes the door behind himself, and walks to her.

Rainbow tries to back away, but she can't move. She can't breathe.

"You've been misbehaving, Rainbow." Her father is towering above her. His face is a perfect picture of contempt, and his eyes are boring straight into her.

"I know the best medicine for that."

He swings a hoof. Rainbow screams, but there's no sound. The world collapses and she is falling, faster and faster downward. Her father's hard and cruel laughter drowns out the sound of her pounding heartbeats. A black shadow grabs a crushing hold and pulls her further down. She can't move, can't struggle, can't escape. Her vision floods with darkness, and it eats her.

"Listen to this one!" Pinkie Pie says, excited.

Rainbow is thrown back into reality, hyperventilating. She is sitting outside, at a café, in Ponyville. Her best friends are all around her.

Pinkie Pie tells a joke, and everypony laughs. Rainbow's is hollow.