Coaching is a very unique and special partnership.  As a manager, people know that you are fundamentally trying to get them to be in compliance and produce certain results.  But, as a coach, there tends to be more of a feeling of partnership towards your mutual success and development.  That partnership creates a different energy and willingness to be open to new ways of looking at things and being taught.  That new energy is usually based upon trust and is the foundation for the whole coaching relationship.  When a manager shifts their energy to that of a coach, it can make all the difference in the world.