On the underground people are forced to stay in a tight space next to each other and, even though in a short time, they share unique experiences that will vanish forever after a time lapse. Sometimes they live in a mental space that connects them outside, to a different spot. Maybe where they were only 5 minutes before or where they are heading, or in a visionary place where they feel safe and protected. A few crawl through absent glances looking for improbable contacts, others talk to their traveling partners careless for being watched or listened to.
I have visually disconnected passengers from the physical space they are immersed in, highlighting details - accessories that belong exclusively to their intimate dimension.