Harry Potter and the Order of the Phoenix
The upshot of it all was that Professor Umbridge spent her first afternoon as Headmistress running all over the school answering the summonses of other teachers, none of whom seemed able to rid their rooms of the fireworks without her. When the final bell rang and they were heading back to Gryffindor Tower with their bags, Harry saw, with immense satisfaction, a disheveled and soot-blackened Umbridge tottering sweaty-faced from Professor Flitwick's classroom. (28.99)
"The Cruciatus Curse ought to loosen your tongue," said Umbridge quietly.
"No!" shrieked Hermione. "Professor Umbridge – it's illegal."
But Umbridge took no notice. There was a nasty, eager, excited look on her face that Harry had never seen before. (32.197-199)
"Fine," said Hermione, now sobbing into her hands again. "Fine ... let them see [the weapon], I hope they use it on you! In fact, I wish you'd invite loads and loads of people to come and see! Th - that would serve you right – oh, I'd love it if the wh - whole school knew where it was, and how to u - use it, and then if you annoy any of them they'll be able to s - sort you out!"
These words had a powerful impact on Umbridge: she glanced swiftly and suspiciously around at her Inquisitorial Squad, her bulging eyes resting for a moment on Malfoy, who was too slow to disguise the look of eagerness and greed that had appeared on his face. (32.231-232)