"Your overconfidence is almost amusing," observed Quirrell dryly, all hint of a stutter gone. He'd fixed his gaze on Percy, as well as the point of his wand, and looked a great deal more frightening, somehow, even though nothing about him had particularly changed from the Quirrell who had stammered his way through a year of substandard, mostly-theoretical Defense classes. Something about him radiated evil. "What are you doing here, Weasley?"