"Rainbow Dash, what was-" Twilight asked, staring into the sky out of her open window.

"I know! Pretty awesome, right?" Rainbow interrupted her, enthusiastically. She hovered impatiently outside her window, clearly looking forward to the race.

You had managed to catch up to her, but she had flew over faster than you had expected. You weren't sure if the spell on your wings was beginning to wear off, but this definitely wasn't a good time for it to do so.

"But... What was it? I've never seen anything like it before!" Twilight exclaimed, happily. The original Sonic Rainboom was how the mane 6 were brought together in the first place, so seeing something like that must've been pretty remarkable.

You also hovered by the window, partially hidden by Rainbow Dash, who was practically in her face.

"Ask Storm! I'm sure he can answer you!" Rainbow explained, moving over enough so that Twilight could see you. Now the attention was on you.

"Storm, you did that? How is that possible?" Twilight asked, recalling your original Sonic Surge. While the colour of your shockwave whilst solo was yellow like a lightning bolt, it transferred to a much darker black whilst performing a double rainboom in order to contrast the brightness of Rainbow's rainbow.

"We did it together. It was a-" you attempted to explain, once again being interrupted by Rainbow Dash.

"Double Rainboom!" she yelled, once again blocking Twilight's vision.

"A Double Rainboom? That was said to just be a myth!" Twilight exclaimed, seeming as surprised as you were when you pulled it off.

"Wasn't the Sonic Rainboom just a myth before I did it?" Rainbow bragged, seeming to brush it off as if it was no big deal. If it was anypony else, her big ego would come across as obnoxious, but somehow Rainbow managed to twist a usually bad trait into something positive.

"You wouldn't mind if I studied it a bit more, right?" Twilight asked, excitedly, "I'd need you to do it again at some point, though."

You couldn't see a reason as to why she couldn't. Well, other than the fact that you might not be able to do it again.

"Sure, but I'm not so sure I can do it again." you said, almost sounding a little shameful.

"What?" Rainbow exclaimed, turning around to face you, "C'mon Storm! You pulled it off like it was nothing!"

She always made it sound so easy. Maybe that was what you liked about her, but she was clearly forgetting about your enhanced wings.

"Heh. I guess you're right." you said, deciding to play along for now. You weren't even sure when the magic powder's spell was going to wear off, or even if it would at all.

"By the way, Twilight..." Rainbow said, turning back to her, "Me and Storm were gonna have a race across Ponyville if you and Spike wanna watch!"

Oh, right. You had almost forgotten.

"Sure, Rainbow! We'd love to watch! We'll meet at Sugarcube Corner in an hour!" Twilight said, happily, before closing the window.

Ugh, you thought. The more ponies that want to watch, the better. The more humiliated you'll feel when you lose.

"Hey, what's wrong?" Rainbow asked, nudging you a little. She had clearly noticed your worried expression.

"Huh? Nothing! Nothing's wrong!" you said, instantly attempting to regain your positive attitude. Thankfully, it seemed to work.

"Ok, well we've still got a few more places to stop by!" Rainbow explained, "C'mon, Storm!"

In the blink of an eye, she shot off towards Fluttershy's house without even waiting for you. You let out a small sigh before following her, just as quickly.

This was going to be a long day.

----------------------------------------------------------------------------------------

"Attention everypony!" Twilight called out, standing in front of Sugarcube Corner. All of the Mane 6 had been gathered, and now even more ponies had appeared to watch.

Both you and Rainbow stood on the imaginary track that you were to race on. She was obviously taking this pretty seriously, as she seemed to be doing some form of excersise to get ready.

"We've all been gathered here to watch a battle between the two fastest Pegasi in Equestria!" Twilight explained, only adding to your anxiety. She was announcing it like it was some sort of competition.
As far as you knew, this was only a friendly race.

"Nervous, Storm?" Rainbow asked, seeming a little uneasy herself.

"Nope." you lied, pretty unconvincingly, "Are you?"

"Ha! Like I'd be nervous!" Rainbow said, giving you a falsely confident smirk. You could tell that deep down she was worried about this. Maybe she was scared of losing her pride if she lost to you, but either way, there had never been a Pegasus that could rival her speed before.

The rest of the Mane 6 watched from the sidelines, most trying to find higher ground in order to get a better view of the event that was about to unfold.
It was about time for Twilight to relay the course to you.

"Both Storm and Rainbow Dash will race from here to Carousel Boutique, from which they will then race to the Golden Oak Library, ending the track back here at Sugarcube Corner!" Twilight announced. It wasn't the most difficult course you could imagine, but it's sheer length may cause an problem.
"The first one to complete two laps will be the winner!" she added, further adding to the courses length. This worried you, as you still had no idea if or when the spell on your wings would wear off.

"Remember you two," you heard Applejack say from the side of the track, "This is a friendly race. So no cheating, Rainbow Dash."

Out of the corner of your eye, you could see Rainbow give her a nervous smile.

"Cheat? Me? I would never dream of it!" she said, smirking nervously. At that moment, you begun to have flashbacks to when her and Applejack competed in the Running of the Leaves.
You just hoped it wouldn't end up like that.

"Ready you two?" Spike called from Twilght's side.

"Ready!" you both called, your voice sounding slightly more reluctant. Even now, after pulling off the world's first Double Rainboom, the idea of racing against Rainbow Dash still scared you.
But even then, there was no backing out now.

The two of you began to rev up your wings, preparing for a take off at as high a speed as possible. You had to remember that you had a speed limit, however. You didn't want to accidentally cause a Sonic Surge.

"3..." Twilight said. And thus began the longest three seconds of your life.

"2..." she said. Beside you, Rainbow Dash had a concentrated look on her face that you hadn't seen before.

"1..."

Here it comes.

"Go!" Twilight exclaimed, and just like that, it begun.

Rainbow shot off in an instant, leaving nothing but a multicoloured trail in her wake. Thankfully, you too had a large burst of speed saved up, and within a few seconds you no more than a few metres behind her.

Before long, the two of you had circled Carousel Boutique, beginning to make way towards your home: the Golden Oak Library.

You hadn't been in Equestria for long, but this part of Ponyville had become incredibly familiar to you. That should have given you a slight advantage, but all it did was make your flight through the area slightly easier.

Upon beginning your circle around the familiar tree, something began to feel off. You were still neck and neck with Rainbow Dash, so you could conclude that she wasn't cheating.

No...

This strange feeling of discomfort was originating from you. More specifically in your wings.

Oh, no. Zecora's spell was beginning to wear off.

"Oh... shit." you muttered to yourself, unheard by Rainbow Dash who was now speeding ahead. The sudden shift in your wings had caused you to lose focus on your race, and had almost sent you plummeting towards the ground.

There was no way your wings were going to be able to adapt to such a sudden change without landing, but doing such would sacrifice the race.
And there was no way you were giving up that easy.

"Storm!" you heard several voices called, mainly that of Twilight and Applejack. Rainbow was likely too focused on the race to notice the sudden interference with your flight.

Nevertheless, something deep within you saved you from having to land. The determination to at least go out fighting had begun to build up within you, and with it your wings power.

In a sudden burst of yellow energy, your wings once again felt as if they were under Zecora's spell. Only this time, it felt more... permanent.

You felt yourself flying at a speed you had not believed to be possible without causing a Sonic Surge, but here you were flying at such a speed.

You weren't sure what you had done, but whatever it was had given you a chance to win this race. You weren't that much faster, yet it still seemed like you were beginning to gain on Rainbow Dash.

And in the end, you were right. In a blaze of glory, you shot passed Rainbow as you proceeded onto the second lap.

"Huh?" Rainbow gasped as you zoomed past her in the blink of an eye. Cheers erupted from the crowd of ponies that had gathered below as you overtook the fasted Pegasus in Equestria, even despite the setback you had prior.

Rainbow simply stared ahead in disbelief as you continued to gain an even greater lead.

"I guess you're asking for it, huh?" Rainbow said to herself, before preparing to fly at an even greater speed. At this rate she was bound to cause a Sonic Rainboom.

If such a thing was to happen at such a low altitude, it would surely cause some major damage to the structures in Ponyville. Not to mention, it might cause even more damage to the actual residents of Ponyville.

An all too familiar vapour cone had begun to form around Rainbow, as she suddenly began to regain the lead she had previously had. She shot past you, leaving you in a slight state of shock as you stared at the cone forming around her.

"Rainbow! Stop!" you called, slowing down you flight in an effort to stay as far away from incoming Rainboom in the event that it did happen.

"What?" Rainbow called in response, seeming to be enough to slow her down. Unfortunately, the cone of vapour that was forming around her had already gained enough pressure to launch a full grown pony, meaning that as soon as she finished those words...

Snap.

Rainbow let out a scream as she was launched through the air, possibly all the way over to the Everfree Forest. Seeing that she had practically eliminated herself from the race, there wasn't really a point to continue flying.

You flew back down to Sugarcube Corner, preparing to tell them that you were about to head out to find where Rainbow had landed.

"Sorry, I've got to go and find R-"

"That was amazing!" Pinkie Pie interrupted you, seeming to buy time for Rainbow to find her own way back.

In less than a few seconds, Rainbow had already flew back over, seeming more eager than ever to continue the race.

"Storm! You tired out or what?" she taunted, in an effort to get you back up into the sky. She didn't exactly look ready to race. She had a few bruises on her, presumably from when she impacted the ground, and had leaves intertwined with her mane.

"Rainbow Dash! You look hideous!" Rarity said, instantly reacting to the sight of leaves in ones mane.

"Eh. it's just a scratch." Rainbow replied, brushing off the near-rainboom she had just created. Nevertheless, she still seemed to want a second round of the race.

"How about we call it a draw?" you suggested, not wanting to hurt her pride, but also not wanting to physically hurt her by getting her to race again. Your suggestion was met by silence from her, "I mean, you kinda just nearly did a Sonic Rainboom!"

That seemed to make her see sense.

"I guess I got a bit carried away, huh?" Rainbow admitted, rubbing the back of her head sheepishly.

"Speaking of that..." you heard Twilight say, interrupting you, "Storm, you were flying at the same speed as Rainbow, but you didn't cause a rainboom-"

"Surge." Rainbow interrupted, correcting the incorrect usage of the term 'rainboom'.

"Right. Surge. But how was that possible?" she questioned, looking just as confused as you were. Truthfully, even you didn't know.

"Yeah! Were you cheating?" Rainbow accused, flying up close to you with a suspicious expression.

"Now Rainbow Dash, I'm sure there's a perfectly good reason as to how Storm was flying that fast." Applejack said, saving you when you had nothing to come back with.

You hadn't been cheating. Not as far as you knew. But even then that sudden burst of speed was unintentional.

"Storm, when you began to speed up, you flashed with this yellow light," Twilight explained. You hadn't noticed, but then again how could you?
You were too busy trying to stay in flight to notice a quick flash of light, "If it's ok with you, I'd like to research it a bit more."

You saw no problem with that. If anything, you could discover what it was that caused you to fly so fast.

"Sure! I live with you anyway, so it's not a problem!" you reminded her. Upon mentioning the fact that you live with Twilight, Rainbow shuffled uncomfortably in the air, visibly noticeable.

"Rainbow, are you ok?" Fluttershy asked, seeming to notice her sudden uncomfortableness before even you.

"What? Oh, yeah, I'm fine!" she insisted, "Just tired from the race, that's all!"

She seemed like she was being truthful, but even then, you never really could know. It wasn't exactly too unbelievable that she would be tired out after being launched by a rainboom, though.

"I'm gonna head home and rest up! See ya guys!" Rainbow said, before shooting off in the direction of her house. She was definelty acting strange, but for now, you figured you shouldn't question it.

"So when do you need to research my wings?" you asked, shifting your attention back to Twilight.

"How about tonight?" she suggested. You weren't sure how she was going to research your flight inside of a small library, but you were sure she knew what she was doing.

And besides, the more you knew about your own wings, the better.

...

Right?

Author's Notes:

Probably another shorter chapter next, but it's gonna be pretty lore heavy if you know where to look.

Speaking of lore, this chapter has quite a few links to previous chapters. Some important, some not. Some obvious, some not. The most obvious one is probably the chapter itself. It's a callback to the first 10 chapters, back when the only piece of story was that Rainbow and Storm were planning to race each other, only Storm had no idea how to fly.

I did say I'd come back to it, right