" I AM NOT PAYING FOR SOME CRACKPOT OLD FOOL TO TEACH HIM MAGIC TRICKS!" yelled Uncle Vernon. But he had finally gone too far. Hagrid seized his umbrella and whirled it over his head. ‘NEVER –’ he thundered, ‘– INSULT – ALBUS – DUMBLEDORE – IN – FRONT – OF – ME! "

― J.K. Rowling , Harry Potter and the Sorcerer's Stone (Harry Potter, #1)