Mysterious Grepper

I just watched Over A Barrel (S1, E21) and noticed that the characters used appropriate pronouns when referring to buffalo. Dashie: "Nobody tricks Rainbow Dash and gets away with it." Twilight: "Why won't anybody be rational and reasonable?!" In the first sentence, Dashie was referring to a buffalo, in the second, Twilight was referring to both ponies and buffalo. I first heard Twilight's comment and thought it was a mistake, intended to be "anypony." It ma...