Celestia wandered into the palace kitchens, her muzzle held high in the air.
"Hmm... cake!" she exclaimed. "May I try some?"
She opened her eyes, watching as a layer of cake materialized in the air. A moment later, it vanished, reappearing instantly below its previous location. Over and over it dropped in stages, before landing firmly between two other slabs of cake...
...And then vanished. All three cakes, gone.
"TETRIS PHYYYYSSSSIIIIIIIIICS!" Celestia roared into the air, shaking her hoof at the unforgiving sky creature called The Author.