That having been said, any thoughts on RPing the feat as a knock out? In PvP, I think I would have the choice to RP it as a kill or a KO, according to the server's PvP rules. But what about against NPC mobs?Starting at 15th level, a monk can set up fatal vibrations within the body of another creature once per day. Unless the target makes a Fortitude saving throw (DC 10 + 1/2 the monk's level + the monk's Wis modifier), it dies. Quivering Palm does not work on creatures that have immunity to critical hits. Creatures that have higher hit die or level than the monk are also immune to this ability.
As I see it, the biggest problem with RPing it as a KO is that the feat explicitly says the target dies.