What is this? WHat have I done??

CONFOUND THESE PONIES! THEY DRIVE ME TO WRITE FAN FICTION!

So yeah, it's my idea of why Rarity was absent during the Nightmare Night episode. Oh, there's an "official" reason given by Luren herself, but let me dream, okay?

Apologies for the horrible grammar mistakes. English is not my native language, in case you didn't notice.