For a split second, Harry thought how absurd it was for Tonks to expect the dummy to hear her talking that quietly through a sheet of glass, when there were buses rumbling along behind her and all the racket of street full of shoppers. Then he reminded himself that dummies could not hear anyway.
J. K. RowlingWell I think it is often the case that the biggest bullies take what they know to be their own defects, as they see it, and they put them right on someone else and then they try and destroy the other and that's what Voldemort does.
J. K. Rowling