I thought of a variety of possibilities actually.. The immediate one that occurred to me was that suddenly the lift door opens and people see them so close and so she pretends to faint or something!
Now, suddenly the possibility that occurred to me is even better! What if (coz of all this hardwork nautanki that Arjun's making the lift do) the lift gets stuck or something? That would mean the lights would go off! :D And guess who's scared of the dark?!?! ;-D maybe she'll hug him or something woohoooo i'm so excited i don't think i'll sleep any time soon! :-\