Twilight Sparkle, a violet coated Alicorn mare and Equestria's newest princess, was dining at a popular restaurant with her trusty assistant Spike the dragon at her side. Twilight was eating a light meal of a daisy sandwich and a large order of hay fries she and Spike were sharing. She could tell Spike was enjoying his meal, since she had borrowed some sapphires from Rarity's for Spike to have with his fries. Soon they were finished. Twilight paid the waitress 23 bits and left the eatery. She levitated Spike onto her back and cautiously flew to the library. "I needed to get used to flying anyway..."
A few minutes after reaching her home, Twilight's dark purple eyes shot open. "Oh no! I forgot about the party!!!" The poor mare had completely forgotten about the celebration Pinkie was planning for her close friend Fluttershy, who had just returned from volunteering at an animal shelter all the way in Fillydelphia. She quickly grabbed a fancy dress she had gotten from the Carousel Boutique, along with star-shaped mane clips, and rushed to the door toward the train station. Unfortunately, she had forgotten to use the restroom on her rush to meet her friends.
Twilight was the last pony at the train station. All her friends were waiting patiently.
"Why, there you are darling! We were beginning to think you wouldn't be here on time and miss the train!"
"Howdy, Twilight, we were startin' ta think ya wouldn't show up!"
"THERE you are! What was the holdup!? We've been waiting FOREVER!!!"
"Yeahwewereherelikeforeverandevenmorethanthatliketwoforeversandahalfandwethoughtyouwouldmissthetrainbutdon'tworryweweren'tgonnaleavewitoutourbestestfriendinallEQUESTRIA!!!" Pinkie kept rambling and afterwards, grabbed the tardy mare into a bear hug, leaving a half-suffocated and completely dazed Twilight Sparkle. She then noticed a slight feeling of discomfort in her lower area, but she brushed it off. Then, everypony had to board the train.
Twi, along with her other five friends, boarded the train. The discomfort she felt gradually got worse. Slowly, slowly, slowly, she got the urge to fart. The fries didn't sit well with her, but she refused to poot in front of all her friends and many other random ponies riding the train to Fillydelphia.
She started to shift a bit uncomfortably as the feeling got worse. She grunted a little, and AJ noticed. "You alright, sugarcube?" Applejack asked. Twilight quickly said she was fine, even though she knew that statement wasn't true. Twilight kept moving around, her face clearly showing how badly she felt. The ride was a three-hour journey, and she sure wasn't ready for it.
Twilight nervously pressed her rear end against the seat. She moaned and checked the watch Pinkie Pie had given her for a birthday party last year. 2 hours, 50 minutes left. She decided to try to get something that would take her mind off the growing pain in her abdomen. She had forgotten to bring a book along with her, but Rainbow dash had almost the entire series of Daring Do books. Twilight whispered to Dash,
