It appears to be an excerpt from one of the Harry Potter books. If you read the full context you will see that Mr. Dursley finds himself surrounded by strangely dressed people.
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Anonymous1) So do you think that they are collecting money or that they are just gathering together?As I said, you need to read the quote in context. When you do you will see that the strangely dressed people are wizards.
Anonymous2) Also, what is meant with "silly stunt".?Have you looked up the words? "silly stunt" is not