Removes spawn() from some things

Yay, refactoring.

code/modules/surgery/organs/augments_chest.dm

@@ -21,11 +21,11 @@
 		return
 
 	if(owner.nutrition <= hunger_threshold)
-		synthesizing = 1
+		synthesizing = TRUE
 		owner << "<span class='notice'>You feel less hungry...</span>"
 		owner.nutrition += 50
-		spawn(50)
-			synthesizing = 0
+		sleep(50)
+		synthesizing = FALSE
 
 /obj/item/organ/cyberimp/chest/nutriment/emp_act(severity)
 	if(!owner)
@@ -57,22 +57,10 @@
 /obj/item/organ/cyberimp/chest/reviver/on_life()
 	if(reviving)
 		if(owner.stat == UNCONSCIOUS)
-			spawn(30)
-				if(prob(90) && owner.getOxyLoss())
-					owner.adjustOxyLoss(-3)
-					revive_cost += 5
-				if(prob(75) && owner.getBruteLoss())
-					owner.adjustBruteLoss(-1)
-					revive_cost += 20
-				if(prob(75) && owner.getFireLoss())
-					owner.adjustFireLoss(-1)
-					revive_cost += 20
-				if(prob(40) && owner.getToxLoss())
-					owner.adjustToxLoss(-1)
-					revive_cost += 50
+			addtimer(src, "heal", 30)
 		else
 			cooldown = revive_cost + world.time
-			reviving = 0
+			reviving = FALSE
 		return
 
 	if(cooldown > world.time)
@@ -83,7 +71,21 @@
 		return
 
 	revive_cost = 0
-	reviving = 1
+	reviving = TRUE
+
+/obj/item/organ/cyberimp/chest/reviver/proc/heal()
+	if(prob(90) && owner.getOxyLoss())
+		owner.adjustOxyLoss(-3)
+		revive_cost += 5
+	if(prob(75) && owner.getBruteLoss())
+		owner.adjustBruteLoss(-1)
+		revive_cost += 20
+	if(prob(75) && owner.getFireLoss())
+		owner.adjustFireLoss(-1)
+		revive_cost += 20
+	if(prob(40) && owner.getToxLoss())
+		owner.adjustToxLoss(-1)
+		revive_cost += 50
 
 /obj/item/organ/cyberimp/chest/reviver/emp_act(severity)
 	if(!owner)
@@ -97,13 +99,16 @@
 	if(istype(owner, /mob/living/carbon/human))
 		var/mob/living/carbon/human/H = owner
 		if(H.stat != DEAD && prob(50 / severity))
-			H.heart_attack = 1
-			spawn(600 / severity)
-				H.heart_attack = 0
-				if(H.stat == CONSCIOUS)
-					H << "<span class='notice'>You feel your heart beating again!</span>"
-
+			H.heart_attack = TRUE
+			addtimer(src, "undo_heart_attack", 600 / severity)
 
+/obj/item/organ/cyberimp/chest/reviver/proc/undo_heart_attack()
+	var/mob/living/carbon/human/H = owner
+	if(!istype(H))
+		return
+	H.heart_attack = FALSE
+	if(H.stat == CONSCIOUS)
+		H << "<span class='notice'>You feel your heart beating again!</span>"
 
 
 /obj/item/organ/cyberimp/chest/thrusters

code/modules/surgery/organs/augments_internal.dm

@@ -140,9 +140,11 @@
 /obj/item/organ/cyberimp/brain/anti_stun/emp_act(severity)
 	if(crit_fail)
 		return
-	crit_fail = 1
-	spawn(90 / severity)
-		crit_fail = 0
+	crit_fail = TRUE
+	addtimer(src, "reboot", 90 / severity)
+
+/obj/item/organ/cyberimp/brain/anti_stun/proc/reboot()
+	crit_fail = FALSE
 
 
 //[[[[MOUTH]]]]

code/modules/surgery/organs/organ_internal.dm

@@ -125,18 +125,19 @@
 		if(!special)
 			H.heart_attack = 1
 
-	spawn(120)
-		if(!owner)
-			Stop()
+	addtimer(src, "stop_if_unowned", 120)
+
+/obj/item/organ/heart/proc/stop_if_unowned()
+	if(!owner)
+		Stop()
 
 /obj/item/organ/heart/attack_self(mob/user)
 	..()
 	if(!beating)
+		visible_message("<span class='notice'>[user] squeezes [src] to \
+			make it beat again!</span>")
 		Restart()
-		spawn(80)
-			if(!owner)
-				Stop()
-
+		addtimer(src, "stop_if_unowned", 80)
 
 /obj/item/organ/heart/Insert(mob/living/carbon/M, special = 0)
 	..()