Film music is something I hold very near and dear to my heart. Actors on the screen are attempting to invoke an emotion, meanwhile the composer is attempting to do the same, but in a (usually) much more subtle manner. This is an example of a less subtle manner, but an example all the same.
I imagine two possible applications here:
1. The King approaches on his horse (slow motion), sword drawn, about to deliver the felling blow to our hero, who is down. Music ends after he dismounts and takes a few steps, bringing him inches away from the hero.
2. The aged, evil king is slowly making his way across the throne room, all eyes on him, his would-be successor watches and plots.