To my faithful student, Twilight Sparkle,
Twilight, I trust and believe in you always, but consider this a formal request to stop dancing without lessons in public. In your own home, or a party thrown within said home where guests are aware you will be dancing are of course fine, your dance moves have raised significant concern that you are, in fact, having a seizure, may be possessed by fell monsters from beyond the pale, or that your flailing hooves may have caused permanent injury.
Your exuberance and excitement in your appreciation of music is laudable and I really am glad you are having fun, but it is necessary to think of others.
Your loving mentor,
Princess CelestiaPS. Anon once mentioned something called 'The Safety Dance' to me. Perhaps this is something you could learn in the pursuit of safer self expression?