Fix Mulebots running over themselves, fix runtime with blood.dm

code/modules/mob/living/carbon/human/human.dm

@@ -260,6 +260,8 @@
 
 	spread_fire(AM)
 	
+	..() // call parent because we moved behavior to parent
+
 // Get rank from ID, ID inside PDA, PDA, ID in wallet, etc.
 /mob/living/carbon/human/proc/get_authentification_rank(var/if_no_id = "No id", var/if_no_job = "No job")
 	var/obj/item/device/pda/pda = wear_id

code/modules/mob/living/living.dm

@@ -246,7 +246,7 @@ default behaviour is:
 
 // Called when something steps onto us. This allows for mulebots and vehicles to run things over. <3
 /mob/living/Crossed(var/atom/movable/AM) // Transplanting this from /mob/living/carbon/human/Crossed()
-	if(AM.is_incorporeal())
+	if(AM == src || AM.is_incorporeal()) // We're not going to run over ourselves or ghosts
 		return
 	
 	if(istype(AM, /mob/living/bot/mulebot))

code/modules/organs/blood.dm

@@ -360,7 +360,7 @@ proc/blood_splatter(var/target,var/datum/reagent/blood/source,var/large)
 		drop.drips |= drips
 
 	// If there's no data to copy, call it quits here.
-	if(!source)
+	if(!istype(source))
 		return B
 
 	// Update appearance.