Earlier movies... more recent sketches. Did that make sense? Well, maybe not, but I'm going back now to revisit some lesser characters, magical creatures, and a few somewhat major characters I just didn't get before, for whatever reasons.
From Harry Potter and the Prisoner of Azkaban, here is "Aunt Marge" Dursley, who breeds and raises bulldogs, to which she bears no small resemblance, herself! In this scene, she's being cruel to Harry, trying to goad him into a reaction so that she can assert her dominance further. She is asking if caning is used as punishment at the school Harry attends, hoping the answer is yes.
Later, stranded on his own, Harry is picked up by the "Knight Bus" -- a magical vehicle that can take a witch or wizard nearly anywhere. Its conductor is Stan Shunpike, only a few years older than Harry. He reads a wizarding newspaper, on the front of which is a picture of a dangerous escapee from Azkaban, the wizards' prison. Harry asks who that is.
In the shadows, Stan leans in towards Harry. "Who is that?!" Stan replies. Not knowing who Harry is, he can't believe Harry doesn't know who Serius Black is. He especially relishes saying that Serius Black is "a murderer!"