This is an inking and colouring of one of the frames in
's brilliant Epic Equestrian Mealtime strip. If you haven't seen it, do check it out: [link]
It's absolutely amazing. Edit:
I just realized this has been posted on the EqD drawfriend. I want to make it very plain that the actual drawing was not done by me, but for the Ask-Twilightsparkle tumblr! I just colored it.