I am currently working on writing the combat rules for a Dishonored LARP with a team, and we are stuck on how to proceed with a certain point: handling falling.
Sometimes during LARP melee combat my enemy would stumble and fall down. What should happen in such a situation? It feels very unsafe to continue beating my opponent, engaging in brawl is generally unsafe too, and brawling during LARP is typically banned around my area (Moscow, Russia).
However, just giving my opponent time to stand up feels very, very unfair, actually making it sometimes desirable to fall down to get extra few seconds to look around.
Should I just assume that my opponent is automatically hit (knocked out, lost all of their HP etc.)? Should it only happen if I somehow mark being nearby and hitting them when they are lying down on the ground? What if my opponent would actually be invincible to my hits for some reason? How should I distinguish it in the rules as a GM if someone falls down or makes a dodge-roll etc?
So, as the one creating the official combat rules of a given game, how should I handle those who accidentally fall down during combat?