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Harry Potter and the Order of the Phoenix  - J.K. Rowling

"Why, I thought you might be grateful for a little extra authority."

 

Harry would not have been surprised to see sparks fly from Professor McGonagall's nostrils.

 

"You thought wrong," she said, turning her back on Umbridge.

 

LOOOOOOOVVVVVVVVVVVEEEEEE McGonagall!!