Professor McGonagall: Oh, there you are, Potter. Are you and Miss Patil ready?
Harry: Ready, Professor?
Professor McGonagall: To dance! It's tradition that the three champions-well in this case four are the first to dance. Surely I told you that?
Harry: No.
Professor McGonagall: Oh, well, now you know.

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The Ball is about to commence. Harry is nervous enough just having to attend.

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