A/N: The challenge was to write a drabble involving a magical malady. My inspiration came from an actual event related to me by jldecker.
Disclaimer: Harry Potter, Minerva McGonagall, Severus Snape, and all their associates are characters belonging to J.K. Rowling. I claim no rights to them, their surroundings, or their situations. Much to my sorrow.
Figment
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Minerva had thought she'd seen everything. But she had to admit, a giant white rabbit in a waistcoat was something new. It bounded down the corridor and leaped clear over her head, shouting that it was dreadfully late.
Thinking there had been a Transfiguration accident, she started to follow--but stopped short as a familiar, resonant voice asked dazedly, "Merlin. Did you see that?"
She turned to find Severus propped against the wall behind her, staring glassy-eyed after the bunny.
Understanding dawned. "Severus...perhaps you had better visit Poppy."
Chronic sleep deprivation in a wizard could have some very strange symptoms.