There was to be a great Yule ball at Hogwarts, organized by the headmasters of Hogwarts, Durmstrang and Beauxbatons, as a way to teach the students international magical cooperation. In hopes of keeping the students from making fools of themselves, it was up to each head of house to have dance instructions provided to their students. Since Professor McGonagall considered herself an apt dancer, she chose to teach her house, herself. She noticed Sirius Black and James Potter grinned widely as she walked to the phonograph to start the music. As soon as the music started, she knew exactly why the two pranksters were grinned. She glared at the boys as "What's new pussycat? Whoa, Whoa..." blared across the room.