Being a Saturday, there was one thing and one thing only on the minds of most of the youth of the town of Canterlot; relaxation. All anyone wanted to do was just unwind a little after a week at school, and so, that was exactly what most of them did. There were no big events for them to partake in and no serious sports for them to exert more energy on today. No, the most anyone did today was just sit in quiet places with each other and just have a few pleasant chats with their closest friends. So, all over Canterlot, the general atmosphere was one of calm and tranquillity. That is, except for one place; Sugar Cube Corner. Now, in all fairness, this place did have as much of a laid-back feel as everywhere else in the town, if not more so, and yet, there was undoubtedly a feeling of tension there, and all of it stemmed from one particular booth, and the two girls who sat there.

Pinkie Pie, from Canterlot high, and Indigo Zap, from Crystal Prep, both sat close by to one another. Although to one simply passing by, things seemed far from friendly, as the two sat in utter silence, glaring intently at one another. The quiet between them was most uncomfortable, and even Mr and Mrs Cake, in the few moments when they cast a glance in their direction, knew from looking not to get involved. But, after a good long while, the silence was broken by Indigo.

“So…you ready?”

Narrowing her eyes, Pinkie nodded.

“Always.”

And with that, they finally made their move. Both girls turned simultaneously to what appeared to be a veritable horde of milkshakes, almost a dozen each, all laid out before them on their table. And without saying a word, they were at them, grabbing the glass nearest to them and starting to slurp like they’d never slurped before. The sound of milkshake being drunk at high-speeds was now the loudest sound that could be heard in the Corner, and all the while, the two girls looked as intense as ever. As soon as one glass was emptied, the girls would move to another, and then another. Time went on and they kept up this pace, neither one proving to be faster at this than the other. But, unfortunately for Indigo, it was when she’d reached her eight milkshake when she suddenly found that she could go no further, reaching up to the side of her head with a pained expression.

“ARGH!!! Brain freeze!”

But Pinkie looked unconcerned, finishing off her own milkshake before slamming the empty glass down upon the table, after which she looked to Indigo with a look of utter triumph.

“Ha! I win! All hail Pinkie Pie, the world’s grand milkshake champion!”

Turning to her, Indigo frowned somewhat.

“Urgh! You got lucky!”

But Pinkie turned to her with a smile, raising a finger and swaying it from side to side.

“Nu-uh! There’ll be none of that, Indigo! You just bit off way more than you could chew, baby!”

Rolling her eyes at that, Indigo, while still nursing the side of her head, nevertheless afforded herself a brief chuckle, reaching out with her other hand towards Pinkie.

“Alright, alright. All hail Pinkie then.”

Looking to the offered hand, Pinkie giggled with delight before taking it, and the two shook in agreement. In this moment, they allowed themselves a few moments of laughter together, after which, they both leaned back into their respective spots on the booth, letting out contented sighs. After a few moments more though, Indigo turned to Pinkie once more, looking genuinely impressed with her companion.

“Gotta hand it to ya, Pinkie…you are crazy…but in the good way!”

Giggling at that, Pinkie looked over to Indigo.

“Thanks! I try my best.”

Chuckling at that, Indigo raised both arms, allowing herself a moment or two to stretch a little before looking back to the Canterlot High girl.

“I don’t even know where you put it all! That was the most milkshakes I've ever had, but you just took it like it was nothing!”

A brief look of pride crossed Pinkie’s face at that.

“Well, I have been dealing with sweet stuff for a pretty long time now. My whole life, actually.”

Indigo nodded at that.

“Oh yeah, I heard you were a baker or something. How’s that working for ya?”

Pinkie looked to her with a wide smile plastered over her face.

“Oh…I love it! Especially when…”

The girl didn’t finish, at least not at first, but instead began to do something that totally caught Indigo off-guard. She got up on her feet and, with an almighty jump, leapt up onto the table in front of them. While Indigo was understandably shocked by this behaviour, Mr and Mrs Cake, who were standing nearby, merely gave a good-natured laugh at the whole thing, knowing already where this was going. As for Indigo, she kept watch as Pinkie finally spoke up again, taking a deep breath first before belting it out.

“…all you gotta do is take a cup of flour, add it to the mix! Then just take a little something sweet, not sour! A bit of salt, just a pinch!”

The girl took another deep breath, ready to deliver yet more upbeat and catchy tunes, only to stop when Indigo raised a hand, looking to her with utter confusion.

“Er…what are you doing?”

Pinkie paused for a moment, looking around for a bit before looking down at Indigo and shrugging her shoulders.

“Um…singing?”

Indigo raised a hand to the bridge of her nose, running it slightly before looking up to Pinkie again.

“I can see that! But…why?”

To that, Pinkie looked at Indigo as if she’d just asked the most ridiculous question in the world, which, as one might expect, caused her to giggle further.

“Because it’s fun! Because it’s what I do!”

Indigo considered that for a moment, turning away from Pinkie as she did so.

“Yeah…I think I heard that from somewhere. You like singing and stuff. I just didn’t expect it to be so…so…”

Tilting her head slightly, Pinkie began to finish Indigo’s sentence for her.

“Fun? Exciting? Bubbly?”

But Indigo shook her head.

“I was gonna go with random personally.”

Yet again, her words elicited a giggle form Pinkie, and this time, the bouncy-haired girl jumped down from the table, after which she sat down in the booth once more before addressing Indigo.

“There’s nothing wrong with that, Indigo! It’s adds a little fun to life when we just do stuff out of nowhere like that! Keeps people expecting the unexpected and stuff!”

To that, Indigo let out a brief laugh.

“You know, you kinda sound like Lemon when you talk like that.”

Pinkie nodded.

“Sounds good to me! I mean, no offense, but Lemon’s probably the most fun out of all of you!”

Considering that, Indigo nodded a little before shrugging her shoulders.

“Yeah…I can see that.”

However, mere moments later, she turned back to Pinkie, raising an eyebrow as she did so.

“I dunno, just having you sing out-of-nowhere like that feels kinda…weird. I mean, nobody else does it.”

Looking to her companion, Pinkie gained a confused look of her own.

“Er…yes they do.”

Indigo turned to her with an incredulous look.

“Seriously? When?”

Smiling again, Pinkie raised a hand and pointed it straight at Indigo.

“Well…you did, silly!”

Needless to say, Indigo seemed quite taken aback by that.

“Wha…what?!”

Pinkie nodded.

“Sure! You and all those other Crystal Prep girls! You all sang a whole bunch of times back at the Friendship Games!”

Hearing that, Indigo frowned slightly.

“No…no we didn't!”

But Pinkie, folding her arms, took on a look of defiance, all while maintaining her smile.

“Yep! Totally random musical numbers. At least two of them, I think. Like when you were all urging Twilight to do that magic stuff? You were all “unleash it” and being all creepy about it.”

Indigo sat there in silence for a few moments, looking form Pinkie, to further away, and then back again, all while looking like she was deep in thought over something.

“No! We…we weren’t singing! We were…we were…”

But, the longer she thought on that, the less and less sure of herself she seemed to be, and she began to look away from Pinkie.

“Wait…were we singing? Is that what we were doing?”

Pinkie, still folding her arms, nodding with a look of victory on her face.

“Yep! You were! I mean, it was kind of a bad guy song, but good all the same!”

But Indigo shook her head, after which she looked back to Pinkie, still looking as confused as ever.

“But…it doesn’t make sense! How would we all know the same lyrics? How would we know how to sing together without having any group practise and stuff? How would we all know that particular moment to sing in the first place?”

To that, Pinkie shrugged her shoulders.

“Dunno. Just kinda happens. Pretty cool though, right?”

But Indigo seemed far from calmed by those words, instead just shaking her heads over and over again.

“This…this is nuts! This is crazy! I just…how could we not have noticed this before?”

Giggling again, Pinkie scooted over, wrapping a single arm around Indigo and holding her close.

“Welcome to our world, friend!”