The result of a 30-minute caffeine rush [CokePony Inflation]

>drink a coke spiked with bad juju one unfortunate night of partying
>end up in Equestria as soda pone
>hard and smooth to the touch like glass, but still somehow flexible
>feel the carbonated fizz sloshing inside with each step
>the sweet concoction refills on its own
>if you don't empty out after a certain amount of time, the pressure becomes almost unbearable
>it becomes harder to walk without harshly shaking the stuff inside
>if you rock it too much, it starts to bubble and foam out of each hole it can
>even if you're gentle, it will leak out on its own until it levels off around your stomach
>other ponies seem magnetically drawn to your condition
>they clamor to you for a curious taste
>they try to find some way of siphoning it out of you
>kissing your lips or your 'other lips' and taking a swallow
>it's invasive, but at the very least they can keep your buildup levels low
>distraught and tired of the attention, you try to go to Twilight for help
>she claims she can work up just the spell to reduce the overflow problem
>give her a couple of days to work out the details while staying at her library
>she and Spike have the honors of making sure you don't overflow before she's finished
>a few drinks are all they need to give before you're content again
>and they don't seem to mind the extra sugar rush the soda gives, either
>72 hours of examining your condition and researching spell conditions later
>she says she can cast a spell that can help you expel the soda on your own easier
>however, she claims it's still experimental, and she might need a test run
>swallow anxiously, but ultimately give your consent
>her horn glows and surrounds you with a magic aura
>within a second it's gone and you don't feel too much different
>she assures that it's a gradual thing you won't notice until you start to refill
>with that, you rest easy
>the dark liquid fills your translucent bottle of a body, like usual
>after a point, though, something seems a little off

>you can feel it pouring in, but for some reason you don't see its level rising
>in a frenzy, you look down and scope out your belly
>sure enough, instead of rising, the liquid is pooling at one point
>and your belly is looking worse off for it
>it bulges out to each side and swells rounder at the bottom
>you can even feel it swaying as it squishes into your hocks, maintaining its pliability while keeping its glassy properties
>try to walk or at least waddle, but the most your legs can do is click against your belly
>no chance they can maneuver around it now
>cry out to Twilight, who only seems puzzled
>turns out the spell acted how she meant it, in a manner of speaking
>no chance for the soda to spill out this way
>but the magic which helps your body function has been altered
>now, instead of filling up, you're filling out
>and what a fill-out it is
>your belly is steadily growing and easily becoming the largest part of your body
>even your legs, which gravity usually dictates as having the majority of your body's sweet contents, are looking emptier than usual
>you can see Twilight furiously flipping through her book do devise a counterspell as your growth can only get faster
>soon you're nothing more than a set of legs wiggling futilely on top of a bulb
>to make matters worse, you can tell from the wet feeling between your hindlegs that your body's enjoying this all too much
>the cold, smooth glass of your underbelly brushes against the lower part of your nethers the more it swells
>any soda that spills through your pussy is soon replenished, not nearly having the necessary force to move enough fluid out
>instead it can only trickle down your body helplessly, eventually staining the wooden floor beneath you and releasing the distinct scent of cola through the room
>with a loud "A-ha!" Twilight finds the right point in her notes to at least pause your expansion
>she lights up her horn once again and aims it to you, and after a brief warmth, you sense some reprieve

>you can feel it pouring in, but for some reason you don't see its level rising
>in a frenzy, you look down and scope out your belly
>sure enough, instead of rising, the liquid is pooling at one point
>and your belly is looking worse off for it
>it bulges out to each side and swells rounder at the bottom
>you can even feel it swaying as it squishes into your hocks, maintaining its pliability while keeping its glassy properties
>try to walk or at least waddle, but the most your legs can do is click against your belly
>no chance they can maneuver around it now
>cry out to Twilight, who only seems puzzled
>turns out the spell acted how she meant it, in a manner of speaking
>no chance for the soda to spill out this way
>but the magic which helps your body function has been altered
>now, instead of filling up, you're filling out
>and what a fill-out it is
>your belly is steadily growing and easily becoming the largest part of your body
>even your legs, which gravity usually dictates as having the majority of your body's sweet contents, are looking emptier than usual
>you can see Twilight furiously flipping through her book do devise a counterspell as your growth can only get faster
>soon you're nothing more than a set of legs wiggling futilely on top of a bulb
>to make matters worse, you can tell from the wet feeling between your hindlegs that your body's enjoying this all too much
>the cold, smooth glass of your underbelly brushes against the lower part of your nethers the more it swells
>any soda that spills through your pussy is soon replenished, not nearly having the necessary force to move enough fluid out
>instead it can only trickle down your body helplessly, eventually staining the wooden floor beneath you and releasing the distinct scent of cola through the room
>with a loud "A-ha!" Twilight finds the right point in her notes to at least pause your expansion
>she lights up her horn once again and aims it to you, and after a brief warmth, you sense some reprieve

>you look over yourself and the damage done
>you just barely manage to clear the ceiling, taking up a considerable amount of the library's airspace
>your belly creaks from the strain as it tries desperately to keep together
>inside, you feel the biggest pang of a lifetime, worse than any binge or upset stomach
>but at the same time, you can't help but find some pleasure in it
>the way your belly presses against all the right points on your sex
>the way that your navel presses hardly on the floor, overstretched and bearing all of the weight of the sugary soft drink
>you can't help but bite your lip and curl your hooves a little from the feeling
>Twilight, however, seems less amused
>now she has to figure out how to get you back to size before your natural functions reactivate
>with a sigh, she looks up to you to explain
"I can only think of one way to shrink you down, and I'm not sure if you'll like it."
>you have an inkling of where she's going with this, but it's not like you can do much else except trust her
>one last spell is cast on you, and it's the hardest one to bear yet
>each part of you trembles as the soda bubbles furiously
>she's simulating a small earthquake, only it's all focused on you
>you feel a rush of air move to your lips as you vibrate more
>the soda foams angrily and starts to expand
>the creamy-brown froth move up to the top half of your body, forcing your limbs and cheeks out as they start to inflate accordingly
>the foam rounds out the upper half of your body and replaces the otherwise empty air, causing you to grow and almost touch the ceiling with your back
>a torrent of coke and effervescence launches from every hole it can find, the high-pressured release taking you by surprise and causing a sputtering cough
>although it helped a little and your belly's a little smaller, there's still far too much soda inside to move properly
>and worse yet, your limbs are even more stubby thanks to the influx of air
>defeated, Twilight ceases her spell

>she looks around to the mess
>a lot of soda drenched her books, the walls, and any furniture that happened to be in the wrong place at the wrong time
>she returns her gaze to you while Spike reluctantly runs a mop around you
"Looks like we might have to wait a little longer. I don't think we can afford doing that again, or you might flood the whole library!"
>by now, the results of being shaken have dissipated, and you're no longer rocketing the soda through your mouth
>you're about sick of the taste of coke by now, and you're not even halfway done with getting rid of it all
>you still feel rather bloated, and the settling carbonation has only rounded you out even further
>much less of a pony in shape and more of an orb, at the very least you can be moved by rolling now
>she taps on your body with a few clicks before giving you a heavy push
>after a bit of effort she takes you out of the way into a corner of the room
>she goes slowly so she doesn't disturb the soda any more
>you still wince and hope that she doesn't accidentally crack you
"But don't worry! We'll have you fixed up, eventually."
>she tries to sound hopeful, but her apprehension in sounding out the last word proves her doubt
>luckily, she manages to station you in her intended spot
>with a wipe of her brow she steps back from her efforts
>you want to say something, but only a loud, saccharine belch comes from you
>you're a little impressed with yourself as you manage to make the walls and furniture shake a little, even knocking over a stool nearby
>the less enthusiastic Twilight closes her ears and looks away, waiting until you're finished before shaking her head
>with a glow of her horn she aims her magic toward your mouth and hindquarters
>let out a muffled yelp of surprise as you feel each hole sealed shut
"I hate to do this, but for now, I'm going to need to do a LOT of research. And I can't have any noises distracting me."
>a little disheartened, you can only look on, hoping she can cure you soon