[Tony spends about half an hour wandering around trying to find him, poking his head into every room that's not locked, then starts fussing at the locked doors. As luck would obviously habit it, he soon finds himself fussing at the room Bruce has locked himself in, poking his eye in the keyhole to see if he can see him.]

Bruce? [Pause.] Please tell me you're in here? I'm really not good at the cat burglar angle.

[Starts to wonder if he should get Sherlock to sniff him out of where ever he's hiding right now.]