Make it snow around midnight, that way it'll put a wrench in everyone's plans to get home and they'll be too drunk to drive anywhere unfamiliar. We might get people partying through till dawn, that way. Also, before I totally forget ...

[ TACTICSSS. Sliding a couple of prettily wrapped presents out of his cardigan, he offers a small pink box first, then a purple of the same size. ]

This one is your main present, but this one made me think of you and I couldn't resist.