my obsession

hp2pg47 - "He's never traveled by Floo powder," said Ron suddenly. "Sorry, Harry, I forgot."
"Never?" said Mr.Weasley. "But how did you get to Diagon Alley to buy your school things last year?"
"I went on the Underground-"
"Really?" said Mr.Weasley eagerly. "Were there escapators? How exactly-"
"Not now, Arthur," said Mrs.Weasley. "Floo powder's a lot quicker, dear, but goodness me, if you've never used it before-"
"He'll be alright, Mum," said Fred. "Harry, watch us first."