"Make a point never go clear, it is great odds that a man whose habits and the bent of whose mind lie a contrary way, shall be unable to comprehend it. So weak a thing is reason in competition with inclination."

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The opportunity was too perfect to miss. Harry crept silently around behind Malfoy, Crabbe, and Goyle, bent down, and scooped a large handful of mud out of the path. 'We were just talking about your friend Hagrid,' Malfoy said to Ron. 'Just trying to imagine what he's saying to the Committee for the Disposal of Dangerous Creatures. D'you think he'll cry when they cut off his hippogriff's—' SPLAT. Malfoy's head jerked back as the mud hit him; his silverblond hair was suddenly dripping in muck.

— J. K. Rowling