JustAWeeb

If a friend came up to you and asked you to show him an episode of MLP, because he doesn't understand why you watch it, what would be the first episode that would come to your mind to show him? Mine would be "A Hearth's Warming Tail", since it does not spoiler too much (apart from twily being an alicorn in a castle, but I'm pretty sure they won't pay much attention to that detail), and it basically doesn't feature the "real" characters for the most part, or doesn't involve any important backstory. It has a good animation, and the songs are catchy, while the story is also quite solid. What would be your pick to show someone?