Flu?

"Doctor, doctor!"

"My god man, what on earth is the matter with you?"

"I think I'm terribly, terribly poorly."

"Okay. What are your symptoms?"

"Well, I just can't stop dancing."

"MY GOD."

"What? What is it?"

"I just don't believe it."

"Doc, what is it? You're scaring me."

"You have a case of...Boogie Fever."