I were being rescued from a fire, I would choose a firefighter who had physically practiced rescuing people from a burning building. Firefighting is a dangerous activity, where every second counts. The firefighter needs to be able to react quickly and appropriately to the danger that is swirling around. The firefighter needs well-practiced sets of brain-links that he or she can call on even under conditions of high stress. Such sets of links do not develop by simply watching.