There were once two soldiers. One soldier was always yapping about the other in a self-righteous manner, pointing out every flaw and sanctimoniously declaring what he thought his colleague should do about it. The soldier on the receiving end paid the yapper no heed; he just kept marching on.
One day in the heat of battle, the yapper, through his own stupidity, got himself caught in a trap. His army continued to fall back to their own lines, heedless of his plight. The yapper was not very well-liked and it was his own fault he was trapped there. Nobody spared a second thought for the guy as the enemy closed in around him. No one would think of putting his own safety at risk by throwing himself in front of enemy fire to pull that brat out of a trap he'd practically laid for himself.
Then, to the astonishment of everyone, the soldier whom the yapper had derided sped back across no-man's-land. At the last second, he cut the yapper free and began pulling him back to their own line, firing at the enemy in the process. In so doing he put himself in front of the same enemy fire that had been reserved for the yapper.
How does the story end? I guess we'll find out.