A great emphasis is placed on safety and preventing "entrapment", a situation where escape from the fire is impossible. Prevention of this situation is reinforced with two training protocols, "Ten Standard Firefighting Orders" and "Eighteen Situations That Shout Watch Out", which warn firefighters of potentially dangerous situations, developed in the aftermath of the Mann Gulch fire. As a last resort, many wildland firefighters carry a fire shelter. In this inescapable situation, the shelter will provide limited protection from radiant and convective heat, as well as superheated air. Entrapment within a fire shelter is called a "burnover". In Australia, firefighters rarely carry fireshelters (commonly referred to as "Shake 'N' Bake" shelters); rather, training is given to locate natural shelters or use hand tools to create protection; or, in the instance of 'burnover' in a tanker or other fire appliance, 'fire overrun' training is used.