|"Are you a wizard or not?"
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This joke was about two plumbers who found themselves in a flooded building. It was told by Vernon Dursley to Mr. Mason and his wife during a dinner party in 1992. However, Vernon was interupted by noises from upstairs, which were caused by the house-elf Dobby.
Behind the scenes
- In the novel, it is Mr. Mason who has a story about American plumbers that Petunia Dursley claims she has been dying to hear.