diff --git a/code/modules/mob/living/carbon/human/human_defense.dm b/code/modules/mob/living/carbon/human/human_defense.dm
index 65a05fdcea0..1faf2f7e7ab 100644
--- a/code/modules/mob/living/carbon/human/human_defense.dm
+++ b/code/modules/mob/living/carbon/human/human_defense.dm
@@ -440,19 +440,19 @@ emp_act
 	var/penetrated_dam = max(0,(damage - SS.breach_threshold))
 	if(penetrated_dam) SS.create_breaches(damtype, penetrated_dam)
 
-/mob/living/human/reagent_permeability()
+/mob/living/carbon/human/reagent_permeability()
 	var/perm = 0
-	
+
 	var/list/perm_by_part = list(
-		"head" = THERMAL_PROTECTION_HEAD, 
-		"upper_torso" = THERMAL_PROTECTION_UPPER_TORSO, 
-		"lower_torso" = THERMAL_PROTECTION_LOWER_TORSO, 
-		"legs" = THERMAL_PROTECTION_LEG_LEFT + THERMAL_PROTECTION_LEG_RIGHT, 
-		"feet" = THERMAL_PROTECTION_FOOT_LEFT + THERMAL_PROTECTION_FOOT_RIGHT, 
-		"arms" = THERMAL_PROTECTION_ARM_LEFT + THERMAL_PROTECTION_ARM_RIGHT, 
+		"head" = THERMAL_PROTECTION_HEAD,
+		"upper_torso" = THERMAL_PROTECTION_UPPER_TORSO,
+		"lower_torso" = THERMAL_PROTECTION_LOWER_TORSO,
+		"legs" = THERMAL_PROTECTION_LEG_LEFT + THERMAL_PROTECTION_LEG_RIGHT,
+		"feet" = THERMAL_PROTECTION_FOOT_LEFT + THERMAL_PROTECTION_FOOT_RIGHT,
+		"arms" = THERMAL_PROTECTION_ARM_LEFT + THERMAL_PROTECTION_ARM_RIGHT,
 		"hands" = THERMAL_PROTECTION_HAND_LEFT + THERMAL_PROTECTION_HAND_RIGHT
 		)
-	
+
 	for(var/obj/item/clothing/C in src.get_equipped_items())
 		if(C.permeability_coefficient == 1 || !C.body_parts_covered)
 			continue
@@ -470,9 +470,9 @@ emp_act
 			perm_by_part["arms"] *= C.permeability_coefficient
 		if(C.body_parts_covered & HANDS)
 			perm_by_part["hands"] *= C.permeability_coefficient
-	
+
 	for(var/part in perm_by_part)
 		perm += perm_by_part[part]
-	
+
 	return perm
 
diff --git a/code/modules/organs/organ_external.dm b/code/modules/organs/organ_external.dm
index a4ab3322217..4b6a03a7e24 100644
--- a/code/modules/organs/organ_external.dm
+++ b/code/modules/organs/organ_external.dm
@@ -838,13 +838,13 @@ Note that amputating the affected organ does in fact remove the infection from t
 	if((status & ORGAN_BROKEN) || cannot_break)
 		return
 
-	owner.visible_message(\
-		"\red You hear a loud cracking sound coming from \the [owner].",\
-		"\red <b>Something feels like it shattered in your [name]!</b>",\
-		"You hear a sickening crack.")
-
-	if(owner.species && !(owner.species.flags & NO_PAIN))
-		owner.emote("scream")
+	if(owner)
+		owner.visible_message(\
+			"\red You hear a loud cracking sound coming from \the [owner].",\
+			"\red <b>Something feels like it shattered in your [name]!</b>",\
+			"You hear a sickening crack.")
+		if(owner.species && !(owner.species.flags & NO_PAIN))
+			owner.emote("scream")
 
 	status |= ORGAN_BROKEN
 	broken_description = pick("broken","fracture","hairline fracture")
@@ -857,7 +857,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 	// This is mostly for the ninja suit to stop ninja being so crippled by breaks.
 	// TODO: consider moving this to a suit proc or process() or something during
 	// hardsuit rewrite.
-	if(!(status & ORGAN_SPLINTED) && istype(owner,/mob/living/carbon/human))
+	if(owner && !(status & ORGAN_SPLINTED) && istype(owner,/mob/living/carbon/human))
 
 		var/mob/living/carbon/human/H = owner
 
@@ -905,11 +905,11 @@ Note that amputating the affected organ does in fact remove the infection from t
 	if(src.status & ORGAN_ROBOT)
 		return
 	src.status |= ORGAN_MUTATED
-	owner.update_body()
+	if(owner) owner.update_body()
 
 /obj/item/organ/external/proc/unmutate()
 	src.status &= ~ORGAN_MUTATED
-	owner.update_body()
+	if(owner) owner.update_body()
 
 /obj/item/organ/external/proc/get_damage()	//returns total damage
 	return max(brute_dam + burn_dam - perma_injury, perma_injury)	//could use max_damage?
@@ -929,7 +929,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 	return ((status & ORGAN_ROBOT) && (brute_dam + burn_dam) >= 10 && prob(brute_dam + burn_dam))
 
 /obj/item/organ/external/proc/embed(var/obj/item/weapon/W, var/silent = 0)
-	if(loc != owner)
+	if(!owner || loc != owner)
 		return
 	if(!silent)
 		owner.visible_message("<span class='danger'>\The [W] sticks in the wound!</span>")
@@ -1013,7 +1013,7 @@ Note that amputating the affected organ does in fact remove the infection from t
 /obj/item/organ/external/proc/get_wounds_desc()
 	. = ""
 	if(status & ORGAN_DESTROYED && !is_stump())
-		. += "tear at [amputation_point] so bad it barely hangs on few tendons"
+		. += "tear at [amputation_point] so severe that it hangs by a scrap of flesh"
 
 	if(status & ORGAN_ROBOT)
 		if(brute_dam)