Several noises and various voices exploded in the laboratory one after the other. It was possible to deduce that Draco had attacked Nott, who had anticipate him in his attack. While Harry shouted at Draco not to do it and the famale Auror casted another Protego, an even more powerful magic had thrown the good guys against the walls and furniture. Many glasses shattered, someone groaned, and Nott spoke with his guttural voice: