Big Mac's carrot patch gets raided, Angel goes missing.
Fluttershy goes out to look for her missing friend to no avail, Big Mac finds Fluttershy crying and alone, the two end up sleeping together on a hill top, the next morning he helps her find Angel which leads to a single kiss, but what happens when the silly mare runs off and Big Mac is left wondering?

My idea of what the Amnimorphic Spell as mentioned in season 2 episode 4 does
And why it is so important to Equestrian History. it's an interesting little "story" that reads like a lesson on Equestrian History.