While he drove, Uncle Vernon complained to Aunt Petunia. He liked to complain about things: people at work, Harry, the council, Harry, the bank, and Harry were just a few of his favorite subjects. This morning, it was motorcycles.
"... roaring along like maniacs, the young hoodlums," he said, as a motorcycle overtook them.
"I had a dream about a motorcycle," said Harry, remembering suddenly. "It was flying."
Uncle Vernon nearly crashed into the car in front. He turned right around in his seat and yelled at Harry, his face like a gigantic beet with a mustache: "MOTORCYCLES DON'T FLY!"
Dudley and Piers sniggered.
"I know they don't," said Harry. "It was only a dream."
But he wished he hadn't said anything. If there was one thing the Dursleys hated even more than his asking questions, it was his talking about anything acting in a way it shouldn't, no matter if it was in a dream or even a cartoon — they seemed to think he might get dangerous ideas.