Taking the bus, there is a sense of ups and downs, indicating that life is slightly unstable. Stopping suddenly means that you are in an emergency.
Getting off a person means that there is something wrong with that person's body or some aspect. Running over a person is a car accident, which means you are scared.
I am anxious and at a loss. After all, the dead are dead. If you know the person who got off the bus or your relatives and friends, it means that he has physical problems. That's why you worry about him, feel anxious and at a loss. Running over him means that you are going to forget these unpleasant things and cheer up again.