Ok, here's a question for you. You are walking down the side walk and you come to a fourway stop with no red lights. On one road you have an ambulance with it's sirens on going to a car wreck. At another road you have a police car going to a homicide. At the third road you have a fire truck going to put out a fire at a burning meth lab, and at the fourth you have a U.S. mail truck delivering mail. Which one has the right of way??