After constructing indirect fireline away from the wildfire's edge, a firefighter begins to burn out the interior fuel to secure the fireline and starve the wildfire of its fuel.
I was once told by a seasoned fire manager that the job of a firefighter was 90% boredom, 7% excitement, and 3% sheer terror! Sure, there are some slow days waiting for assignments or mopping up hot spots on a dying fire, but make no mistake about it, the job is not an easy one, physically or mentally, and requires a fearless attitude to be successful.
A firefighter goes on the offensive, using a driptorch to ignite the unburned fuel between the main fire and the fireline, thereby starving the advancing wildfire of its fuel.