Sideports a couple of init unit tests from Neb.

code/game/objects/effects/chem/coating.dm

@@ -11,7 +11,7 @@
 	create_reagents(100)
 
 /obj/effect/decal/cleanable/chemcoating/Initialize()
-	..()
+	. = ..()
 	var/turf/T = get_turf(src)
 	if(T)
 		for(var/obj/O in get_turf(src))

code/game/objects/effects/decals/warning_stripes.dm

@@ -1,10 +1,10 @@
 /obj/effect/decal/warning_stripes
 	icon = 'icons/effects/warning_stripes.dmi'
 
-/obj/effect/decal/warning_stripes/New()
+/obj/effect/decal/warning_stripes/Initialize()
 	. = ..()
 	var/turf/T=get_turf(src)
 	var/image/I=image(icon, icon_state = icon_state, dir = dir)
 	I.color=color
 	T.overlays += I
-	qdel(src)
+	return INITIALIZE_HINT_QDEL

code/game/objects/effects/mines.dm

@@ -10,32 +10,37 @@
 	var/obj/item/weapon/mine/mineitemtype = /obj/item/weapon/mine
 	var/panel_open = 0
 	var/datum/wires/mines/wires = null
-	register_as_dangerous_object = TRUE
-
 	var/camo_net = FALSE	// Will the mine 'cloak' on deployment?
 
 	// The trap item will be triggered in some manner when detonating. Default only checks for grenades.
 	var/obj/item/trap = null
 
-/obj/effect/mine/New()
+/obj/effect/mine/Initialize()
 	icon_state = "uglyminearmed"
 	wires = new(src)
-
+	. = ..()
 	if(ispath(trap))
 		trap = new trap(src)
-
-/obj/effect/mine/Initialize()
-	..()
-
+	register_dangerous_to_step()
 	if(camo_net)
 		alpha = 50
 
 /obj/effect/mine/Destroy()
+	unregister_dangerous_to_step()
 	if(trap)
 		QDEL_NULL(trap)
 	qdel_null(wires)
 	return ..()
 
+/obj/effect/mine/Moved(atom/oldloc)
+	. = ..()
+	if(.)
+		var/turf/old_turf = get_turf(oldloc)
+		var/turf/new_turf = get_turf(src)
+		if(old_turf != new_turf)
+			old_turf.unregister_dangerous_object(src)
+			new_turf.register_dangerous_object(src)
+
 /obj/effect/mine/proc/explode(var/mob/living/M)
 	var/datum/effect/effect/system/spark_spread/s = new /datum/effect/effect/system/spark_spread()
 	triggered = 1

code/game/objects/effects/prop/columnblast.dm

@@ -17,7 +17,7 @@
 	..()
 
 /obj/effect/temporary_effect/eruption/Initialize()
-	..()
+	. = ..()
 	flick("[icon_state]_create",src)
 
 /obj/effect/temporary_effect/eruption/Destroy()

code/game/objects/effects/spawners/bombspawner.dm

@@ -159,7 +159,6 @@
 
 /obj/effect/spawner/newbomb/Initialize(newloc)
 	..(newloc)
-
 	var/obj/item/device/transfer_valve/V = new(src.loc)
 	var/obj/item/weapon/tank/phoron/PT = new(V)
 	var/obj/item/weapon/tank/oxygen/OT = new(V)
@@ -183,19 +182,14 @@
 	OT.air_contents.temperature = PHORON_MINIMUM_BURN_TEMPERATURE+1
 	OT.air_contents.update_values()
 
-
 	var/obj/item/device/assembly/S = new assembly_type(V)
-
-
 	V.attached_device = S
 
 	S.holder = V
 	S.toggle_secure()
 
 	V.update_icon()
-
-	qdel(src)
-
+	return INITIALIZE_HINT_QDEL
 
 
 ///////////////////////