"I'm sorry, Pinkie, but as Princess Celestia's disgracefully-expelled-for-medical-reasons former student, I have to diagnose you with Bad Syndrome."
"What's that?" Pinkie growled in a raspy voice reminiscent of someone who stood at the end of an unlit tunnel after chainsmoking a hundred thousand cigars. "I feel very evil. Can I bite you?"
"Wha--" Twilight jumped back as Pinkie lunged at her.