I thought faster than I ever had in my life, and just as she was about to cast the Cruciatus, I pretended to break down. Pretending to cry and be reluctant, I told Umbridge a cock-and-bull story about Harry having wanted to contact Dumbledore, to tell him that "the weapon" was ready. Under her questions, I "admitted" that we'd been working on it for some time, that it was in the Forbidden Forest, and "let slip" that it could be used against her. I noticed that Draco Malfoy looked very interested at this bit of news, and made a mental note of it.