Both Rainbow Dash and Pinkie, who had the same idea, of farting on Twilight, stayed where they are.
"Uh...guys, I said don't far...", said Twilight, but was interrupted when Rainbow Dash turned around, pointing her rear at Twilight's face, and released a long, powerful fart.
"Ohhhh yeeeaaaahhhhh", moaned Rainbow Dash, experiencing instant relief from the gas. Pinkie Pie tackled Twilight down to the ground, holding her against the floor.
"HEY!", Twilight struggled to shout," I THOUGHT I...TOLD YOU GUYS TO DO THAT AWAY FROM M...ME!"
"Oh well! Rules are made to be broken", giggled Pinkie, which was followed by her sitting on her face, and farting on Twilight. Rainbow Dash, who once again was filled gas, waited her turn. Twilight coughed, trying to breath in fresh, clean air, but was unable to, since after Pinkie farted, Rainbow Dash took the space, and let a thunderous fart come out. Unluckily for Twilight, when she tried to lift up the two with her horn, one of them swatted it, stopping the spell. Spike was also sleeping, and as a deep sleeper, he is not awoken by sound or smell. Only nudging him would wake him up.
"Come on guys, " said Twilight, muffled by both R.D's butt and fart, "Stop it, go do this to someone else!"
In a chorus-like manner, both Rainbow Dash and Pinkie Pie said "Nope!"
Once again, R.D and Pinkie swapped spots. This time, Pinkie let loose a large, wet fart. This pattern continued for an hour, which was basically until Twilight passed out. When she was out, R.D and Pinkie exited the library.
Now, Pinkie Pie and Rainbow Dash left to...