Draco turned all sorts of interesting colors as he realized what she was saying about his parents, and tried to rush at her, but was stopped by a hand on his arm. "Don't be a damned fool, Draco! You are outnumbered, and don't have your wand. None of us will help you make an ass of yourself!" Draco whirled around and glared at Blaise Zabini, before shaking his arm free and stalking off, followed by his two goons. Harry and the others were watching Draco, to make sure he didn't try something, and so they missed the smirk that formed on Goyle's face, before quickly disappearing.