>Day elastic collisions in Equestria
>Wake up
>Didn’t sleep so well
>You had a nightmare of Butterbutt
>She was standing over you, strapping you down-
>Your attempt at a yawn is interrupted by something in your mouth
>A ball gag
Fucking Fluttershy
>You keep the ball gag with you to use against her later
>In a non-sexual way
>Knock Knock
There’s the little fucker!
>You open the door, ball gag ready
>No Fluttershy
>Only a bull elephant charging
>Right. At. You.
Holy Shit!
>Fluttershy suddenly flies out of the nearby bushes
>”Anon! Quickly, use the ball!”
>You don’t know why but you throw it to stop the elephant
>The ball strikes the elephant’s forehead
>IT DOESN’T AFFECT DONPHAN!
>Since your attack unbelievably failed, you try to get out the way but Fluttershy stops you
>She flies in front of your face and shouts
>”Anon, a 5240kg bull elephant is charging at you at 4.55 m/s. You threw a .15kg ball at a speed of 7.81 m/s at it. As it bounces back at you, what is its speed?!”
>wut
Why the hell would I need to know-
>SMACK
>The ball gag collides into your head at a speed of 16.9 m/s, rendering you unconscious
>The elephant slows down to a stop before it can crash into your house
>”Did I do good mam?”
>”You did wonderful! Made momma so proud.”
>Satisfied, the elephant stomped to who knows where
>”Um…Anon? Are physics your fetish?”
…
>Throwing a glance around for any witnesses, Fluttershy collects the ball gag and drags you inside
>Fucking Fluttershy
>Fucking Physics
 
The idea for this one-shot came to me when I was doing my physics homework.  One of the questions was literally this. I laughed for a solid minute then proceeded to write.