(This tale is told at Treppenwitz, and I found the link to it at Big Lizards)
When I was in the Navy, I once witnessed a bar fight in downtown Olongapo (Philippines) that still haunts my dreams. The fight was between a big oafish Marine and a rather soft-spoken, medium sized Latino sailor from my ship.
All evening the Marine had been trying to pick a fight with one of us and had finally set his sights on this diminutive shipmate of mine... figuring him for a safe target. When my friend refused to be goaded into a fight the Marine sucker punched him from behind on the side of the head so hard that blood instantly started to pour from this poor man's mutilated ear.
Everyone present was horrified and was prepared to absolutely murder this Marine, but my shipmate quickly turned on him and began to single-handedly back him towards a corner with a series of stinging jabs and upper cuts that gave more than a hint to a youth spent boxing in a small gym in the Bronx.
Each punch opened a cut on the Marine's startled face and by the time he had been backed completely into the corner he was blubbering for someone to stop the fight. He invoked his split lips and chipped teeth as reasons to stop the fight. He begged us to stop the fight because he could barely see through the river of blood that was pouring out of his split and swollen brows.
Nobody moved. Not one person.
(To learn the lesson of this teaching story, or parable, go to Treppenwitz)