In the movies, they always make sure the hero kills only in self-defense, typically in the instant before the bad guy gets the drop on him. Even in that film Miyamoto had mentioned, Dirty Harry, Clint Eastwood blows away a guy who had kidnapped, tortured, and killed a teenage girl only when the guy goes for a gun. To me, that's all bullshit. More than anything else, killing is about survival. About doing everything you can to deceive, and cheat, and stack the odds in your own favor. You don't wait for the other guy to go for his gun; you shoot him before he has a chance. If he has his back to you, that's even better. If you can call in an air strike, that's better still. You don't just do everything you possibly can to prevent a fight from being fair--preventing the fight from being fair is the entire point. Do you want the enemy to have as good a chance of killing you as you have of killing him? Or do you want to make sure he gets no chance at all? As far as I'm concerned, the people who think a fair fight is desirable can go ahead and die in one.