She stopped and jerked around, hands balled into fists, but he had his wand out already. Arms raised in front of his face to make sure it was plainly visible, he cried, "Oh, Granger, please don’t hurt me!" voice pitched high, presumably to imitate a scared girl. But she was looking past him, and at first he thought it was a new tactic, ignoring him rather than dressing him down, but it was Crabbe and Goyle coming down the corridor and she was assessing the situation.