Ryuzaki_Izawa said:

That sounds like it'd make at least a semi-decent fic, actually :I

It was actually just a side joke in another story where Chrysalis signed a peace treaty with Equestria on the condition that she could prank the mane 6, Cadence, Shining, and Celestia. In Rarity's prank, she made a beautiful black dress, had Luna invite her to a Gala as thanks for fixing a dress she had kind of ruined when she became NMM (Chryssie had secretly had two 'wealthy ponies' make outfit requests and never pick them up so Rarity wouldn't have time to make her own dress), and had it cursed so it would turn into a trollface 'u mad' shirt. That was when Rarity fainted, but the couch couldn't reach her (like I said, no ticket) so she hit her head and actually knocked herself out. When she wokke up, she slashed the shirt to pieces with a pair of scissors, after which point the shirt turned back into the beautiful dress. Seeing that she had destroyed something so beautiful made Rarity pass out again (only, not the dramatic, hoof-held-to-the-forehead faint, she collapsed like a sack of potatoes)and the couch still couldn't get to her.