" But the crowds are surging around them and her backpack is heavy on her shoulders and the boy's eyes are searching hers with something like loneliness , like the very last thing he wants is to be left behind right now. And that's something Hadley can understand, too, and so after a moment she nods in agreement, and he tips the suitcase forward onto it's wheels, and they begin to walk. "

― Jennifer E. Smith , The Statistical Probability of Love at First Sight