Hermione's head snaps to look at the source of the voice, partially because she hadn't expected to hear anyone — as she'd been alone and hadn't seen anyone coming down the hall when she'd looked — and partially because he sounds annoyed with her, like he's been waiting an age and he couldn't possibly have been, could he? Unless she'd lost herself that thoroughly in thought, something she hadn't had the luxury of doing in over a year. She supposes it's possible that she could have slipped back into the habit of it, though...

She lets go of the ladder and takes a step away from it, looking put out. "No, of course I'm not planning to turn into a statue. I just hadn't decided whether I ought to go up there. It's dark and I haven't any weapons right now."

Which...she shouldn't have said to a complete stranger, she realizes the second after she says it, and that realization almost definitely shows on her expression. In an effort to take attention away from that, Hermione waves an arm in that direction. "You're welcome to it, I suppose, don't let me get in your way any longer than I already apparently have."