This is the third book in this series that J.K. Rowling wrote, and, in this book, Harry gets a permission form that needs to be signed by Uncle Vernon. Then as Uncle Vernon’s sister was coming for a visit Harry decides, to make a deal with Uncle Vernon.

Harry’s deal with Uncle Vernon was, that Harry had agreed to be nice and polite with Aunt Marge and if all goes well then Uncle Vernon agreed to sign this permission form. As the signed permission form would allow Harry to visit Hogsmead.

However, the permission form that enabled Harry to go to Hogsmead never did get signed by Uncle Vernon.

As Aunt Marge, being very opinionated rather likes taunting Harry, and she was drinking a lot of alcohol at the time.

Then as she was quite nasty to Harry, he lost control and made Aunt Marge, swell up, then she rose and floated in the air as if she was a balloon.

Harry then thought he was going to be expelled from Hogwarts, and so he got his trunk and school things etc… and left. Though before he accidently signalled for The Knight Bus Harry thought that something was nearby and was watching him. He then got on the bus, and after recognizing a photograph in the newspaper that Stan Shunpike was reading, Stan Shunpike then tells Harry about what he thought he knew about Sirius Black.

Though Stan Shunpike thought he was talking to Neville Longbottom.