There is an interesting joke about firemen. Does anyone know?

A building is on fire. Because the fire was too strong, all the fire engines stopped at a distance of 0/00 meters from the building/kloc-,but one fire engine went straight downstairs and quickly put out the fire. Afterwards, someone interviewed them: "At the beginning, you were so brave that you rushed downstairs to put out the fire. Other fire engines are only 100 meters away! " They blushed and said with a smile, "In fact, our car brakes are not working, which is too much ..."