It's 11pm, and there's a lull in the department before the post-bar rush that'll almost certainly see you through till morning. You've been trying to decide whether to go and grab something to eat outside or settle for one of the museum specimen cheese sandwiches available in the 'EatYoMoney(TM)' vending machines installed in the waiting room.

You just know that as soon as you go you'll get paged back to the department, but the last time you used the machines the sandwich practically got up and walked out of the department by itself. (Must have been at least partially intelligent to make for the door!). The place looks quiet, surely you can make it to the take-away round the corner...