Author's Notes:

Another request by one of my closest friends and biggest fans on here.

In case it's not specified, it will be ponies this time.

It was the night of the Grand Galloping Gala. The Wonderbolts were always there, and Rainbow Dash was a Wonderbolt now, so she was at the gala in her Wonderbolts uniform. She had been looking forward to this day for a long time.

But, she wasn't feeling very good today. She had eaten some undercooked food for dinner, and needed to poop really badly.

So did Twilight, who was wearing a dark blue dress similar in appearance to the light blue one she had worn at the gala that Discord had brought the Smooze to, and red panties underneath.

And the only bathroom was all the way across the castle on the top floor.

"I have to go to the bathroom," Rainbow told the other Wonderbolts, and she ran. Within seconds, Twilight was running beside her. They had to stop, however, as there was a big crowd in their path and they had to go through it.

"I hope this crowd doesn't go on for too long," said Rainbow. "I need to go, bad!"

"Me too," said Twilight. She let out a wet fart, and blushed.

Rainbow would have laughed, but her desperation made it impossible. She lifted her leg and farted louder.

"Let's try to think of something else until we get to the bathroom," said Twilight. She farted loudly again, and the ponies closest to her gave her a dirty look. "So, I learned a new spell today."

As Twilight was talking about the spell, she kept farting, as did Rainbow, slowly making their way through the crowd. Each time they let out a dirty fart, ponies kept giving them dirty looks, and sometimes reacting to the smell, for their farts smelled really bad.

"That sounds awesome, Twilight!" said Rainbow Dash. BBBBBRRRRRRT! "Now, let's talk about Daring Do."

Twilight hadn't thought about that. She was so excited at the mention of Daring Do that she accidentally let out another loud fart.

For about ten minutes, they talked about Daring Do while trying to get through the crowd, farting constantly, but only stopping their conversation in the middle of particularly loud farts. Their farts got wetter and smellier as time went by.

PPPPFFFFFFT! PPPPRRRRRT! FFFFFRRRRRRT!

BRRRAAAAP! FFFFFRRRRRT! BRRRRRRRT!

By the time they were out of the crowd, Twilight's panties were a little dirty, as was the butt of Rainbow's uniform.

Twilight groaned and let out a boisterous six-second fart that she was sure had made her panties even dirtier.

Rainbow farted just as loud three times.

Just when they reached the bottom of the stairs, Twilight let out another fart, accidentally releasing a load of poop into her underwear. She blushed beet red and stopped in her tracks. Rainbow turned around.

"Twilight, are you all right?"

"I just soiled myself a bit."

The mere thought of it caused a load of scat to plop into Rainbow's uniform, and she cringed. "So did I."

"We need to get to the bathroom before it gets any worse!"

They ran up the stairs, letting out boisterous, wet farts the entire time, while trying to continue their conversation.

FFFFFRRRRRRRT! PPPPBBBBBTTTTH! FFFUUURRRRP! PPFFFFFRRRRRRRT!

PPPPPPFFFFFFFT! BBBBRRRRRRRT! BBBBRRRRRAAAAAAAP! PPPPRRRRRRRRT!

"How many stairs are there?" said Rainbow.

"18 floors, 15 stairs per flight," said Twilight.

Rainbow farted loudly again, soiling herself a bit more. Two ponies walking down the stairs gave her a dirty look.

Two floors later, Twilight farted three times, and on the third fart, she felt a bit more poop go into her underwear.

"Ugh," said a mare walking down the stairs. "What did you eat?"

Twilight blushed.

As they made their way up the stairs, their conversation was constantly interrupted by loud farts, and, occasionally, the mess in Twilight's panties or Rainbow's uniform getting a little bigger, and ponies they ran into either being disgusted or teasing them.

By the time they reached the top, Twilight's underwear and Rainbow's Wonderbolt suit were extremely soiled, filled with wet but solid poop. Despite this, they still had a lot in them, and by now Twilight needed to pee.

"Rainbow Dash, I'm not sure how much longer I can hold it," said Twilight, farting loudly again. "And I need to pee, too!"

Rainbow just groaned and let out a sloppy wet fart. "I just soiled myself a bit more."

They walked down the hall desperately, feeling like they could burst at any moment, but the bathroom was so close. They might actually make it.

Then they turned a corner and saw a long lineup for the bathroom.

At the sight of this, they just couldn't hold it anymore. Both mares started messing themselves full force, rather noisily, and Twilight began peeing full force as well.

Some ponies snickered, others stared in disgust.

Twilight's face was beet red with humiliation. She quickly found a janitor closet and ran inside, magically pulling Rainbow in with her, and closed the door behind them so that no one else could witness their accidents.

Once they were inside the closet, Twilight started to relax, almost enjoying the relief, even though her panties were getting soaked with pee and overflowing with manure.

Rainbow let out a sigh as she continued to soil herself, causing the brown bulge on her uniform to get even bigger.

Finally, they finished their accidents. They still felt a little embarrassed, and smelled really bad.

Twilight took off her panties and emptied the poop into a mopping basket. She didn't care what would happen when the janitor found it. Rainbow also took off her Wonderbolt suit, also dumping her mess into the bucket, and put it back on. Twilight, meanwhile, pulled out a spare pair of panties and put them on.

"You brought spare panties?" said Rainbow Dash.

"You never know when you might need them," said Twilight, and she turned to open the door.

It was locked.