let's make this work

code/modules/mob/living/living_mobility.dm

@@ -10,10 +10,13 @@
 
 //Force-set resting variable, without needing to resist/etc.
 /mob/living/proc/set_resting(new_resting, silent = FALSE, updating = TRUE)
-	resting = new_resting
-	if(!silent)
-		to_chat(src, "<span class='notice'>You are now [resting? "resting" : "getting up"].</span>")
-	update_resting(updating)
+	if(new_resting != resting)
+		resting = new_resting
+		if(!silent)
+			to_chat(src, "<span class='notice'>You are now [resting? "resting" : "getting up"].</span>")
+		update_resting(updating)
+		if(has_gravity() && resting)
+			playsound(src, "bodyfall", 20, 1)
 
 /mob/living/proc/update_resting(update_mobility = TRUE)
 	if(update_mobility)
@@ -168,8 +171,7 @@
 	//Handle lying down, voluntary or involuntary
 	density = !lying
 	if(lying)
-		if(!lying_prev)
-			set_resting(TRUE, TRUE, FALSE)
+		set_resting(TRUE, TRUE, FALSE)
 		if(layer == initial(layer)) //to avoid special cases like hiding larvas.
 			layer = LYING_MOB_LAYER //so mob lying always appear behind standing mobs
 	else