Rose didn't understand why Nott wasn't Disapparating, but she supposed he couldn't. Infact, inable to do anything else, he ran out of the door. Harry, who seemed to have taken a hit to his right arm, wasn't quick enough to stop him with an Impedimenta. The Death Eater fled, and the Auror pursued him. Hermione, who had gone to check on Draco, decided to help Harry.