There is familiar in the unknown when you commute every day; the same carriage, the same people maybe even the same seat. We spend hours with our fellow travellers, we form close yet superficial relationships with them, we know their habits, their scents and smells, how they fold their newspaper, if they snore when they sleep. But we know nothing of what lies beneath the surface of their lives or the consequences of becoming entangled with them. There is no such thing as an ordinary life.