You can tell what personality a person has by walking fast.

People who walk fast may be: sensitive, easily nervous, not confident, insecure, afraid of being laughed at, psychologically stressed, anxious, and psychologically reflected in their behavior. Maybe something unpleasant happened in childhood or adolescence, or parents were too strict and seldom praised. Perhaps the elders at home walk fast, or the family, especially parents, are sensitive, anxious, self-respecting and panic, which will also have a great impact on children. Finally, I want to say that it's no big deal to walk fast, it's no big deal to be nervous when there are too many people, and it's no big deal to think that strangers laugh at you. All these can be improved. As long as you are willing, consciously calm yourself down, walk slowly through crowded places, look at your eyes calmly, and after exercise, maybe in a few years, peace will become your label. Come on ~ one reason for walking is that they don't want to waste time on the road. This kind of person will think that others are simply wasting their lives when they see others walking slowly. They will have a sense of urgency in time, which is also a feature of type A personality. In addition, these people like competition, are easily angered and hostile. I don't know if your friend has other two characteristics. If so, it may be type A personality, in which hostility is highly related to the incidence of coronary heart disease.