The question of "How big is Equestria" had always been on Sunny's mind since she was little. Now, with Zipp's ability to fly, she flies up to the stratosphere with her favourite pony. Meanwhile, Pipp is still having a mental breakdown from the loss of her Pippsqueaks.
(Assuming Sunny's wings are a one-time thing.)
Wow, ZippSunny is actually an interesting ship now that I think about it. Both have more knowledge about Equestria's history than anyone else. Good story.
Dead (in trouble)? For carrying another pony in the air?
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Neat story. I think ZippSunny might actually become a thing just like AppleDash in the past. :)