Celestia turned around, red in the face both from her efforts to speak and sheer embarrassment. And there, standing out of sight of the crowd in the doorway to the balcony, was her sister. She was holding something up in her magic. It was a pair of lungs. Luna shook them about and winked. "Missing something?" she mouthed silently. Celestia launched an angry fart noise in her direction, and Luna slunk off giggling.