Heh heh, she's just so thrilled to go on such an exciting adventure that she just cannot contain her enthusiasm. It has nothing to do with the fact that she still wants Applejack as a sister, and that possessive Apple Bloom stands firmly in the way of her hopes and dreams, who still remains dreadfully mortal and prone to accidents. Nosiree!
Alright, I am not going to start writing grimdark fiction, but seriously, I have no idea why I gave her that face. I was finishing this picture in the wee hours in the morning and must have been partially delusional at that point. So I just went, "Why not?"