Quirrell turned, batting the red bolt away with his wand as if it were an impudent fly, and not even bothering to cast a formal shield charm. Since when had Quirrell been any good at duelling? He was afraid of everything - oh. Right. He was probably a Death Eater only pretending to be incompetent. Think a little, Weasley, Percy chided himself, and tried to control the urge to panic. Bracing himself to duck, he said with an almost-steady sigh, "I was really hoping that would work."