Not real? What are you talking about; of course its—

[but she's interrupted by some spooky piano playing, right on schedule. She holds out an arm to tell House to stay back, and edges towards the nearest spooky piano-free door. She lowers her voice to a tense whisper.]

Stay behind me. Move back—quietly, and we won't have to find out who's playing.

[she steps back towards House and the other door, and nods to it without taking her eyes from the doors to Piano Zone.]

Is that door locked? There ought to be a stairwell close by...