His breath caught in his throat. Of course there would be some easy remedy to his problem—he had picked such a plain one to lie about. Finding a floo was just a matter of going down the hall, probably, and he might of had he found the ingredient.

But he hadn't, so he couldn't continue down his path of lies. If given enough time to think, he might have found a way out of it, but he had only a brief moment between the time the last word left Greengrass' mouth and the moment it became apparent something was off. So rather than allow an air of awkwardness to settle between them, he did the next logical thing and made a hasty move to stand between Greengrass and the only entrance and lifted his wand by an inch.

"I'm afraid I can't," he said, his tone wavering, "and I'm afraid that you can't, either. Not yet."

And then, without another moment's notice, he attempted to disarm Greengrass.

---