Ouch.

code/modules/mob/living/damage_procs.dm

@@ -110,7 +110,7 @@
 
 /mob/living/proc/apply_effects(stun = 0, knockdown = 0, unconscious = 0, irradiate = 0, slur = 0, stutter = 0, eyeblur = 0, drowsy = 0, blocked = FALSE, stamina = 0, jitter = 0, kd_stamoverride, kd_stammax)
 	if(blocked >= 100)
-		return 0
+		return BULLET_ACT_BLOCK
 	if(stun)
 		apply_effect(stun, EFFECT_STUN, blocked)
 	if(knockdown)
@@ -131,7 +131,7 @@
 		apply_damage(stamina, STAMINA, null, blocked)
 	if(jitter)
 		apply_effect(jitter, EFFECT_JITTER, blocked)
-	return 1
+	return BULLET_ACT_HIT
 
 
 /mob/living/proc/getBruteLoss()