Any further discussion was interrupted by the door of their compartment slamming open, and Draco Malfoy, flanked by Crabbe, and, for a change, Ted Nott, were standing there. Draco had his wand clutched in a trembling hand, and he said; "Potter! I don't know how you and the mudblood did it, but, I know you were responsible for killing my father! You're going to pay, and pay dearly!"