Four elevators, one lobby, sixty seconds. Each call light has its own rhythm — three blinks, five blinks, seven — then it goes green and the doors open on whoever's in there. Learn the counts, wait it out in the gaps between the doors, and step into the empty car — but the vacancy moves, so you can't just memorise which one it was. SPACE fakes a text message for a second and a half of social immunity. Two contacts and your nerve is gone.