I didn't smile either, but that's largely due to the fact that when I listen to music I like, I tend to let my mind get wrapped up in the music, and this is no exception.
Some of the responses to this thread, on the other hand...
The synchronized swarming in Fall Weather Friends. I literally groaned loudly at the sight of that. It's also my least favorite S1 episode, but that's just one of the reasons why.
Think about it. Celestia is pretty much a god and is the most powerful being in Equestria. Why, then, does she need the royal guards? For that matter, are they even necessary?
No, that was foreshadowing.
The mane 6 could've used the Elements of Harmony to stop the parasprites in Swarm of the Century, as well as several other enemies, but didn't.