He therefore sprinted up the stairs, slowing down only when he reached the corner into the corridor, when he began to creep, very slowly, toward the very same little girl, clutching her heavy brass scales, that Hermione had so kindly helped a fortnight before.  He waited until he was right behind her before bending very low and whispering, “Hello . . . you’re very pretty, aren’t you?”
Goyle gave a high-pitched scream of terror, threw the scales up into the air, and sprinted away, vanishing from sight long before the sound of scales smashing had stopped echoing around the corridor.

Harry Potter and the Half-Blood Prince – J.K. Rowling