Isabella Fart Story (Phineas and Ferb)

"Hey Phineas, whatcha doin?" Isabella had once again discovered her friends Phineas and Ferb doing something quite spectacular in their backyard. Today, there was a massive, grey machine about the size of a bulldozer that Ferb was working upon.
"Building an instant food machine."
"An instant whaddo machine?"
Isabella took a closer look at the gigantic contraption. It was a monster of machine that was complemented by tens of rusted bronze tubes twisted around its oppressive grey hull. It looked like an giant, upright metal cornucopia with one end facing the sky and the other near the ground.
"Uh, what does the instant food machine do?" Isabella stammered.
"Good question! It makes food, instantly!" Isabella stuck out her bottom lip, feeling stupid.
"Okay, well, how does it work?"
"Well it's a-. It sort of-. It's like a-" Phineas scratched his triangular head.
"Here, a demonstration will do better than an explanation! Ferb, hit the thing!" Ferb complied and pressed an obvious red button. The titanic gadget began to ruffle and shake as steam blasted from a golden spout. Isabella was initially frightened, but was inevitably enchanted by the whimsy of it all. A loud clanging was audible from the metallic belly of the thing. Phineas grabbed Isabella by the hand and pulled her to the downward facing slot.
"Now put your hands out!" Isabella complied.

A yellowish glob fell into Izzy's hands.
"Huh, that's weird. This thing's supposed to make hamburgers." Phineas took another look at his clipboard. Isabella sniffed the strange substance she held in her hands.
"No Phineas, it's fine." Isabella took a careful bite of the sludge. It tasted rather odd, not bad, nor that good. She didn't want to be impolite to her crush, so she slurped the remainder of jelly residue. Phineas was shocked when he saw Izzy with puffed up cheeks and yellow tinted lips.
"Uh, Isabella? You okay?" Isabella gave a thumbs up to comfort him. She gulped the cheekfuls of gelatin in one fell swoop. The bow haired girl retched slightly and gave a small belch, followed by a nervous giggle.
"Heh, excuse me. Um what now?"
"Well the food particles inside the upper compartment aren't merging correctly, which is causing them to materialize as that jello stuff instead of food. Ferb and I will make some adjustments. Hey Izzy? Maybe you could-"
Isabella's tummy gurgled with a ferocious purpose. She could feel her insides bloating and expanding and pulsing as the gas filled her digestive system. She held her belly and curled in pain.
"Oh no Izzy. Are you sick?"
"I-"
*BLLLRRRRRTT*

The sudden gaseous ejection caused Isabella's skirt to violently flutter. Izzy's face turned beet red as she bit her lip. The offensive stench made its way to Phineas's nose.
"Agh! Jeez Izzy!"
"Sorry!" The mass of gas tightened its grip of Izzy's stomach. Isabella involuntarily yelped and cooed in response to her stomachs agony. She had few remaining options.
"Stay back!" Phineas backed away slowly with his palms facing her.
"I'm sorry!" Isabella grit her teeth and grunted.
*FRRRRRPPPPTTT*
*PMMMMMMPPPPPRRRRPPPP*
The subsequent large blasts of gas didn't help Isabella's stomach feel much better, only accomplishing in stinking up Phineas's backyard.
"Ferb come on we've got to put a stop to this!" Ferb followed Phineas into their house to find something to remedy Isabella's farting problem. Isabella groaned, her belly still horribly bloated. She wandered out of the backyard and into the streets. She paced upon the sidewalk, stopping in front of a giant topiary squirrel.
"If I. Could. Just. Hold it. IN!"
*FLLLLLRRRRRTTTTTRPPPPPMMMPPP*
The nasty wind escaped her bum like a devastating gale. It caused the leaves to wilt and decompose. Isabella's pride was at an all time low. She wiped the sweat from her brow, looking for a better place to store her gas. She spot a mailbox across the street. She ran over to it, climbed up and shoved her rear into the inside of the metal box. Izzy's stomach gurgled once again.
"Well, here goes nothing."
*THHHRRRRIIIIPPPPPRTT*
*BBBFFFFFFFFRRRRRRTTT*
*PRRRAAAAAMMMMMPPPPP*
*THRRRRTTTTTFFFFRRAAAAAPPPLLLTT*
Isabella sighed in relief as she unloaded her gas into the mailbox. She got an unfortunate smell of her gas.
"Ewww. That's nasty. Yuck!" She hopped off the mail slot, only to turn around and find the metal of the box rusted and falling apart.
"Oh my."

"Isabella wait!" Phineas and Ferb came running, Phineas holding a small bottle containing a pink liquid.
"Here Isabella, drink this! It'll help!" Isabella took the bottle and inspected the label.
"Prepto Brismol? Why does that sound familiar?" Izzy shrugged and downed the liquid within. It was slightly foul tasting, but worth every ounce. She smacked her lips and wiped her mouth.
"So, is it working?"
"I don't know. Say, what is this stuff? Because I swear I-" A massive rush of thundering gas swelled in Isabella's belly. Consequently, a series of small involuntary toots escaped her.
"Oh my gosh!"
"It's okay, it's okay. Just try to hold it in!"
"I can't. It won't take no for an answer!" Isabella felt it zoom towards the outside world.
"It's coming! It's gonna be a lot!" Isabella placed her hands on the front of her skirt. She winced.
*FFFFFLLLLLLRRRRRRPPPPPRRRRRAAAALLLLLTTTRRMMMMMMMMMMMMMPPPPPPTTTRRRAMMMMMPPPPPPLLLLLLRRRRTTTTFFRRRLLLLLPPPPRRRNBBBBBBB*
Isabella's stomach finally knew true relief.
"That felt good. Phineas did yo-" Isabella opened her eyes to see Phineas and Ferb as piles of ash with blinking eyeballs. She scratched the back of her head and smiled nervously.
"Oops."