This episode is FIM at its best, an amusing comedy of errors that is also an exciting romp.
It all ends with an unexpected twist, despite this episode constantly reminding us to expect the unexpected.
For all jolt of the ending surprise, it's wrapped up nicely in a bow of touching warmth.
It is telling that a supra-majority of ponies LOVE this episode, and that the priceless facial expressions (sulky faces) are considered a key feature.
Princess Luna and Princess Celestia both have pursed, pronounced poutuses, that protrude profoundly, as only princesses possibly could.
Need I say more than this: