Nonlethal Damage

Nonlethal damage is dealt by unarmed attackers and some weapons. Melee weapons that deal lethal damage can be wielded so as to deal nonlethal damage, but the attacker takes a -4 penalty on attack rolls for trying to deal nonlethal damage instead of lethal damage. A ranged weapon that deals lethal damage can't be made to deal nonlethal damage (unless it is used as an improvised melee weapon).

Nonlethal damage does not affect the target's hit points. Instead, compare the amount of nonlethal damage from an attack to the target's massive damage threshold. If the amount is less than the target's massive damage threshold, the target is unaffected by the attack.

If the damage equals or exceeds the target's massive damage threshold, the target must make a Fortitude save (DC 15). If the target succeeds on the save, the target is dazed for 1 round. If the target fails, he or she is knocked unconscious for 1d4+1 rounds.