Just because our MMA is of the street variety does not mean we are reduced to savages. Honor. Bushido spirit. Street MMA combatants have it, sometimes. They know that after knocking out their foe with a single punch they will have the responsibility of dragging their opponent's limp body from the arena and into the Kentucky Blue Grass stands so his head isn't run over by a car and popped like a loser watermelon.
It's the right thing to do.
Learn this important lesson in this latest Street MMA, then think about another lesson, like not fighting on the cement or wearing a bike helmet when coming to fight/grapple.