while i would love to keep helping out, applejack, we've run into a problem. i'm not a horse. i have to kick each individual tree a lot more than you do. and quite frankly, i can no longer feel my legs. why do think i'm down here on the ground?
I don't really know. When I saw the original sketch, I immediately thought it was someone's point of view that was really exhausted. So I guess it could be one of the mane 6 that wanted to give Applejack a hand hoof, but ended up not being able to keep up the pace.