Field Trip to the Water Plant

Inspired by https://derpibooru.org/353533 and https://derpibooru.org/513056

>Cheerilee takes her class on an excursion to a water processing plant.
>After a small calamity with the fillies and colts, Cheerilee has found her mouth bound to a thick hose.
>The sensors detected a lack of pressure in the teacher's body, the system thinking she is a container not filled yet.
>Automatically the tank starts gushing water through the hose into her unwilling maw, forcing her to swallow.
>Gurgling behind the rush of water her belly slowly fills a liter every 15 seconds.
>Wanting to help their helpless teacher, the Cutie Mark Crusaders rush to the control room.
>On instinct they start pressing random buttons hoping one will shut off the machine.
>All they seem to do is increase the release of water from the hose.
>Cheerilee's body instantly blows up, her belly big enough to lay upon as her own waterbed.
>The readers indicate she is 21% full.
>This is one durable container...

>Scootaloo has an idea to deflate Miss Cheerilee: stick another hose in her butt so the water can drain out that way.
>She tries to find a spare hose, but the storage room is all out.
>There are dozens upon dozens of hoses down on the main floor, with the water storage tanks.
>They're all overlapping and wound together like a plate of wet noodles.
>After a few minutes of searching and tugging, Scootaloo finally finds a loose hose.
>Ignoring Cheerilee's protests, she pops the host into her dear teacher's backside.
>Scootaloo should have spent longer looking.
>The other end of this hose actually is connected to another water tank.
>More water pumps into Cheerilee's backside, inflating her even faster.

>Cheerilee reaches 55% capacity in a minute.

>Too late, Scootaloo realizes her mistake.
>She follows the second hose back to the tank it's hooked up to.
>She tries to crank the handle and shut off this nozzle.
>Forgets it's "righty tighty, lefty loosey".
>Opens the nozzle all the way.
>When she tries to turn it back the other way, the handle breaks off in her hoof.

>Cheerilee bloats up to 71% capacity.

>Sweetie Belle thinks she can solve this with magic.
>With her telekinesis, she could siphon water out of the tanks that are filling Cheerilee, and into the other tanks.
>Apple Bloom punches the button to open the cover on all the water tanks.
>Sweetie casts her spell, and successfully creates a magic linkage between the tanks.
>But she forgets to specify which way she wants the water to flow, so the spell defaults to using gravity and relative pressures to move the water.
>So the tanks that had partially emptied into Cheerilee are filling up again.
>Basically, Cheerilee is now getting inflated by double-sized water tanks.

>Sweetie Belle realizes something is wrong, and tries to fix it.
>She casts the spell again.
>Makes exactly the same mistake as before.

>Now Cheerilee has triple-sized water tanks pumping into her from both ends.
>She gurgles and moans against the endless flood.
>At 96% capacity.

-----
Pop Ending
-----

>The hoses' capacity sensors have a five-second lag.
>With two hoses pumping into a single container at the same time, both at the fastest rate, five seconds are pretty significant.
>When the hoses detect she's at 100% capacity, she's actually at 110% percent.
>By the time they stop pumping, Cheerilee is at 121%.
>Cheerilee cries into the hose one last time.

>The explosion could be heard from the farthest corner of the water plant.
>Every colt and filly within a hundred yards was completely soaked.

-----
Non-Pop Ending
-----

>The hoses' capacity sensors have a five-second lag.
>With two hoses pumping into a single container at the same time, both at the fastest rate, five seconds are pretty significant.
>When the hoses detect she's at 100% capacity, she's actually at 110% percent.
>By the time they stop pumping, Cheerilee is at 121%.
>Cheerilee gives a satisfied groan as she looks down at her massively bloated belly.
>At least the madness over.

>Funny thing: a pony is much stretchier than any of the water bladders used at this plant.
>And the sensor programming isn't very robust.
>The hoses weren't designed to deal with a container at 121% capacity.
>So they read it as 21% capacity, and respond accordingly.
>The water flows again.
>Cheerilee resumes inflating.

>She surpasses 200% in half the time it took her to reach 100.
>Keeps bloating larger and larger.
>She's going to keep inflating until these hose sensors manage to stop her exactly at a multiple of 100%.
>But the sensors are so laggy, that might never happen.
>Over 300%.

>Really now, Cheerilee's best chance of escaping is if one of her students somehow frees her.

>All this time, Sweetie Belle has been trying to fix her water-siphoning spell.
>Instead, she's managed to magically link every water tank in the plant up to the ones filling Cheerilee.
>Now Sweetie tries to magically drain the tanks into the river flowing just outside the plant.
>With predictable results.

>Cheerilee wants to sigh, but the flood pumping down her throat won't let her.
>Over 600%.
>No end in sight.