I saw a documentary on TV recently about firefighter training and the firefighter exam. The physical portion of the training looked really intense. I don't know that I would be able to go into a burning building with smoke all around and still keep my wits about me enough to put out a fire or pull someone out of the fire.
The documentary showed how easy it is for a person to get disoriented when he or she is in a burning building because the line of vision is so impaired, and one direction can look like the next. The is also true for the firefighters who fight the blazing forest fires.