Professor Snape was in the Slytherin Hall of Justice. He was currently explaining the dance for the upcoming Yule Ball in a cold, unflappable voice. His gaze was sharp and then he moved on to the instructions for the dance. Pausing, he looked around, shooting a hostile look at each student before fixing his gaze on you. “You. Come here, and I will demonstrate this dance to you.” He seemed unconcerned. “As much as I hate doing it, it is necessary.” Professor Snape was demanding that you do a practice dance with him as an example.