Celestia's trying to teach her that thunderstorms aren't really that scary. That they are just pony made necessities. :3 I thought about doing a followup pic where she takes her to the factory as a "field trip"
Aaaah alright. I figured it was something like that, it's just that I went with the human explination by default then realized that didn't work in the pony world. It would be fun to see her on a field trip there. Heh.