Real life...
From my misspent and occasionally dangerous youth...
SCENE: Me lying on the ground, bleeding, with a 4 inch knife between my ribs...
Jackass who put it there confronted by a buddy of mine with more muscle, skill and common sense.
Jackass: F#&* you man, I'll put a bullet in you!
Buddy: Do you have your gun?
Jackass: It's in my F#&* car...
Buddy: What makes you think you'll make it to your car...
Needless to say even through the shock and pain it was fun to watch the next few moments of that encounter.
Morale of the story: Never assume just because you're fighting 'fair' everyone else is....