You shouldn't be rude and petty to people.
Dan is getting groceries at the store.
Dan wants to finish shopping as fast as he can.
Dan asks the manager to open up another check-out line to speed up service.
Dan refuses to let a person with only a couple of items go in front of him in line.
Dan is thanked for his resourceful thinking by other people waiting in line.
Dan is given dirty looks by all the people around him.