Usually the last step in the hiring process involves some sort of interview with one or more Chiefs of the department. It’s fairly intimidating because you are in a room with the guy who will ultimately hire you but also because you are trying to obtain the lowest position in the department and speaking to the highest ranking members. Truly the Chiefs have a good idea prior to you showing up if they want you or not based on the other parts of the process but the fear is  that you will say something stupid and get bumped from the list.