McGonagal stepped swiftly through the halls of Hogwarts. The tests in her arms needed her immediate attention, and unfortunately she was already two minutes and forty-seven seconds behind schedule due to a prank pulled by that damned Sirius Black. As if the stress from the Triwizard tournament weren't enough, those boys had found it their duty to welcome their foreign brethren with a steady stream of asinine pranks. She was about to turn the corridor to her office when she heard something… rather strange.
She listened intently… Could it be? Was it… Music? She followed the sounds of the straining chords down down down… downdowndowndown the halls down down she went down! the halls until she reached the source of the sound. Cautiously she opened the door and peered inside. What she saw, she knew she would never, ever ever ever evereverever EVER! Forget! Ever. No matter how much she would have liked to.
In the room, Young, greasy, awkward, unpopular, SEVERUS SNAPE! Was…he was DANCING! To a full magically animated string quartet. Yes, dancing. His arms flailing about in an abstract expression of passion and exuberance. His legs moving in way that mankind was never meant to move, and his, oh his face, radiating a look of pure joy, in the same way that a microwave will radiate radiation. Which will in fact kill you.
The affect would have been lovely, had it not been quite so grotesque.