diff --git a/code/modules/mob/mob_grab_specials.dm b/code/modules/mob/mob_grab_specials.dm
index 5158a7f3d07..af50746cd4d 100644
--- a/code/modules/mob/mob_grab_specials.dm
+++ b/code/modules/mob/mob_grab_specials.dm
@@ -51,10 +51,16 @@
 		return
 
 	attacker.visible_message("<span class='danger'>[attacker] [pick("bent", "twisted")] [target]'s [organ.name] into a jointlock!</span>")
+
+	if(target.species.flags & NO_PAIN)
+		return
+
 	var/armor = target.run_armor_check(target, "melee")
 	if(armor < 60)
 		target << "<span class='danger'>You feel extreme pain!</span>"
-		affecting.adjustHalLoss(Clamp(0, 60-affecting.halloss, 30)) //up to 60 halloss
+
+		var/max_halloss = round(target.species.total_health * 0.8) //up to 80% of passing out
+		affecting.adjustHalLoss(Clamp(0, max_halloss - affecting.halloss, 30))
 
 /obj/item/weapon/grab/proc/attack_eye(mob/living/carbon/human/target, mob/living/carbon/human/attacker)
 	if(!istype(attacker))