This may be why New Yorkers instinctively avoid making eye contact with each other in crowded places, why they "look right through you," as dismayed visitors often complain. They are not looking right through you at all; they are discreetly avoiding an intrusion into your space. They sense the danger in a place where a one-degree temperature rise can mean an explosion.
"Spaced In" (p.120) - So This Is Depravity (1980)