When Thorfinn fully understood the treachery of that day, he was across the room in just a few steps. With his hand gripped around Aubin's throat, he yanked the cowering wizard off of the floor and slammed his back against the bookshelf again. All color in Aubin's face disappeared. If Hermione smelled the acrid smell of urine or an even more unpleasant odor, she wouldn't have been surprised. Aubin was a coward and Thorfinn knew what to do with those.