Hagrid: Harry, Sirius is a prisoner of Azkaban.
Harry: What did he do?
Hagrid: The most serious crime a wizard can commit.
Harry: Murder?
Hagrid: No, he stole the Minister of Magic's Skittles.
Harry: That is very serious. I heard he can transform into an animal. Is that true?
Hagrid: Yes.
Harry: What animal? A ferocious black dog?
Hagrid: No, worse.
Harry: What?
Hagrid: A My Little Pony.