June 6, 2013
Rainbow Dash and Twilight Sparkle
No, because I believe that Apple Jack was at a much greater height then shown in the episode. I also believe that pegasi are the lightest among the pony breads because they need to be light to be able to take flight, and I think that those two reason contributed to that particular scene.
What is up? The sky. That's what. Along with the fastest flyer in all of Equestria. The one, the only, Rainbow Dash