“Isn’t it obvious?” she said. “I’m talking about you, Harry.”

There was a moment’s silence. A light night breeze rattled the windowpanes behind Ron and the fire guttered.

“About me what?” said Harry.

“I’m talking about you teaching us Defense Against the Dark Arts.”

Harry stared at her. Then he turned to Ron, ready to exchange the exasperated looks they sometimes shared when Hermione elaborated on far-fetched schemes like S.P.E.W. To Harry’s consternation, however, Ron did not like exasperated. He was frowning slightly, apparently thinking. Then he said, “That’s an idea.” — Harry Potter and the Order of the Phoenix (chapter fifteen)