She was in a hurry, you could tell by watching her. Is she late for work? Is she annoyed that you yanked her out of the office products? Does she compose herself quickly after seeing how big you are? Who scares her? When she turns the key in her car does she say a quick prayer?
Who are these random people? Who do they love? What are their houses like? How many of them have a list? Are they running late or are they just cold, caught in an abrupt weather change?