Generalized handle_movement() checking from shoes to /obj/item.

code/modules/clothing/clothing.dm

@@ -695,9 +695,6 @@ var/global/list/light_overlay_cache = list() //see get_worn_overlay() on helmets
 	update_icon()
 	return ..()
 
-/obj/item/clothing/shoes/proc/handle_movement(var/turf/walking, var/running)
-	return
-
 /obj/item/clothing/shoes/update_clothing_icon()
 	if (ismob(src.loc))
 		var/mob/M = src.loc

code/modules/clothing/shoes/miscellaneous.dm

@@ -73,6 +73,9 @@
 	var/footstep = 1	//used for squeeks whilst walking
 	species_restricted = null
 
+/obj/item/clothing/shoes/clown_shoes/is_mob_movement_sensitive()
+	return TRUE
+
 /obj/item/clothing/shoes/clown_shoes/handle_movement(var/turf/walking, var/running)
 	if(running)
 		if(footstep >= 2)
@@ -216,4 +219,4 @@
 	bootcolor = "orange"
 
 /obj/item/clothing/shoes/ranger/yellow
-	bootcolor = "yellow"
+	bootcolor = "yellow"

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

@@ -1673,3 +1673,17 @@
 
 /mob/living/carbon/human/hearing_boost_range()
 	return (hearing_boost_range + species.hearboost)
+
+// Add gear to this proc that needs to be checked for movement sensitivity.
+// Keep in mind this list will be iterated every single time the mob moves.
+// This should really be a signal or something but augh.
+/mob/living/carbon/human/proc/get_movement_sensitive_gear()
+	// Clown shoes.
+	if(shoes && shoes.is_mob_movement_sensitive())
+		LAZYADD(., shoes)
+	// Tail bells.
+	var/obj/item/clothing/uniform = w_uniform
+	if(istype(uniform) && length(uniform.accessories))
+		for(var/obj/item/accessory in uniform.accessories)
+			if(accessory.is_mob_movement_sensitive())
+				LAZYADD(., accessory)