To serve and protect. That's what it comes to for some firemen faced with someone putting themselves in danger. Firefighters around the world will throw themselves into burning buildings; this firefighter threw himself into a person that was about to jump to their death.
In a hilarious, but life-saving video, a Brazilian firefighter is seen repelling down the side of a building, possibly unknown to the person sitting in the window sill. As the moment of truth approaches, he levies himself off the wall and comes flying like a wrecking ball into the person, knocking them back inside and saving their life.
When you got a job to do, you do it.