I don't know what to say about this, maybe she spotted something or she's just turned to somepony. Nonetheless, this is a great pose of our Purple Smart Book Horse.
Traced from My Little Pony: Friendship is Magic Season 7 Episode 5, "Fluttershy Leans In"
My Little Pony: Friendship is Magic created by Lauren Faust and owned by Hasbro latest (1280×720) (nocookie.net)