there is no way to plan for the accidental or unplanned actions of the players. yes you can fudge the dice or allow for a miraculous luck roll, but it is not so much in the hands of the judge as it is in the hands of the player as to when they die and how. all heroes hope for the honored death that in turn defeats the enemy, but depending on the flavor of the game sometimes they just die.
Heroes inspire the common man to do the uncommon task. You have seen it yourself this night at the hand of the child who killed your brother and scarred you for life; he acted from vengeance but will be seen as a hero by the people of the street. The whispers of weakness have started; soon the roar of their power will defeat you. You may kill me but through my actions the people of Hong Kong have defeated you.
The Final Words of Deathwatch to Yao Ping before his death.
the real thing to try for is to leave a memorable tag line as your slain, or at least one that will haunt the villain in the night.