I’ll just say she was pretty much a jerk for much of the episode xP Like about as bad or perhaps even worse then she was to Luna in Luna Eclipsed. Technially it’s not out of character, but it exaggerates one of Pinkie’s flaws to the point she seems actively mean to Fluttershy in Filli Vanilli. It’s also stupid because it’s two episodes after Pinkie stopped a crazy goof-off after she noticed Rainbow Dash was not having a good time.