Fair warning: Chances are good someone will post spoilers here.So if you can't stand spoilers, skip the comments on this one.
I shudder for reality
It all makes sense! The moon is cringing not just showing it's awful teeth!
Applebloom had a run-in with "heart's desire" too...
Maybe Nightmare Moon was the one behind it all?
Prepare for December 21st my little ponies. Discord will return.