Laconic / My Little Pony: Friendship Is Magic S2 E13 "Hearth's Warming Eve"

And that's how Equestria was made!
Maybe on the way home we can tell you about the unabridged version! It's a gem!

http://tvtropes.org/pmwiki/pmwiki.php/Laconic/MyLittlePonyFriendshipIsMagicS2E13HearthsWarmingEve