diff --git a/code/_helpers/_global_objects.dm b/code/_helpers/_global_objects.dm
index 389bc85b01..a658bf3cbf 100644
--- a/code/_helpers/_global_objects.dm
+++ b/code/_helpers/_global_objects.dm
@@ -1,2 +1,4 @@
 GLOBAL_DATUM_INIT(gear_tweak_free_color_choice, /datum/gear_tweak/color, new)
 GLOBAL_DATUM_INIT(gear_tweak_implant_location, /datum/gear_tweak/implant_location, new)
+//Underwear
+GLOBAL_DATUM_INIT(global_underwear, /datum/category_collection/underwear, new)
diff --git a/code/_helpers/global_lists.dm b/code/_helpers/global_lists.dm
index a1454ac105..1f8b74d949 100644
--- a/code/_helpers/global_lists.dm
+++ b/code/_helpers/global_lists.dm
@@ -63,8 +63,6 @@ GLOBAL_LIST_EMPTY(tail_styles_list)	// Stores /datum/sprite_accessory/tail index
 GLOBAL_LIST_EMPTY(wing_styles_list)	// Stores /datum/sprite_accessory/wing indexed by type
 
 GLOBAL_LIST_INIT(custom_species_bases, new) // Species that can be used for a Custom Species icon base
-	//Underwear
-var/datum/category_collection/underwear/global_underwear = new()
 
 	//Customizables
 GLOBAL_LIST_INIT(headsetlist, list("Standard","Bowman","Earbud"))
diff --git a/code/game/objects/structures/under_wardrobe.dm b/code/game/objects/structures/under_wardrobe.dm
index 6c8ae6e409..b13467fd4e 100644
--- a/code/game/objects/structures/under_wardrobe.dm
+++ b/code/game/objects/structures/under_wardrobe.dm
@@ -18,7 +18,7 @@
 /obj/structure/undies_wardrobe/interact(var/mob/living/carbon/human/H)
 	var/dat = list()
 	dat += span_bold("Underwear:") + "<br>"
-	for(var/datum/category_group/underwear/UWC in global_underwear.categories)
+	for(var/datum/category_group/underwear/UWC in GLOB.global_underwear.categories)
 		var/datum/category_item/underwear/UWI = H.all_underwear[UWC.name]
 		var/item_name = UWI ? UWI.name : "None"
 		dat += "[UWC.name]: <a href='byond://?src=\ref[src];change_underwear=[UWC.name]'>[item_name]</a>"
@@ -67,7 +67,7 @@
 			H.all_underwear -= href_list["remove_underwear"]
 			. = TRUE
 	else if(href_list["change_underwear"])
-		var/datum/category_group/underwear/UWC = global_underwear.categories_by_name[href_list["change_underwear"]]
+		var/datum/category_group/underwear/UWC = GLOB.global_underwear.categories_by_name[href_list["change_underwear"]]
 		if(!UWC)
 			return
 		var/datum/category_item/underwear/selected_underwear = tgui_input_list(H, "Choose underwear:", "Choose underwear", UWC.items, H.all_underwear[UWC.name])
diff --git a/code/game/turfs/snow/snow.dm b/code/game/turfs/snow/snow.dm
index 6b9f4e39f7..d1a4b218f2 100644
--- a/code/game/turfs/snow/snow.dm
+++ b/code/game/turfs/snow/snow.dm
@@ -12,7 +12,7 @@
 	var/list/crossed_dirs = list()
 
 /turf/snow/Entered(atom/A)
-	if(ismob(A))
+	if(ismob(A) && !A.is_incorporeal())
 		var/mdir = "[A.dir]"
 		if(crossed_dirs[mdir])
 			crossed_dirs[mdir] = min(crossed_dirs[mdir] + 1, FOOTSTEP_SPRITE_AMT)
diff --git a/code/modules/client/client procs.dm b/code/modules/client/client procs.dm
index d21b90074b..3b182801d1 100644
--- a/code/modules/client/client procs.dm	
+++ b/code/modules/client/client procs.dm	
@@ -462,7 +462,9 @@ GLOBAL_LIST_INIT(blacklisted_builds, list(
 	var/sql_ckey = sql_sanitize_text(src.ckey)
 
 	var/datum/db_query/query = SSdbcore.NewQuery("SELECT id, datediff(Now(),firstseen) as age FROM erro_player WHERE ckey = '[sql_ckey]'")
-	query.Execute()
+	if(!query.Execute())
+		qdel(query)
+		return
 	var/sql_id = 0
 	player_age = 0	// New players won't have an entry so knowing we have a connection we set this to zero to be updated if their is a record.
 	while(query.NextRow())
@@ -474,11 +476,17 @@ GLOBAL_LIST_INIT(blacklisted_builds, list(
 	account_join_date = sanitizeSQL(findJoinDate())
 	if(account_join_date && SSdbcore.IsConnected())
 		var/datum/db_query/query_datediff = SSdbcore.NewQuery("SELECT DATEDIFF(Now(),'[account_join_date]')")
-		if(query_datediff.Execute() && query_datediff.NextRow())
+		if(!query_datediff.Execute())
+			qdel(query)
+			return
+		if(query_datediff.NextRow())
 			account_age = text2num(query_datediff.item[1])
 		qdel(query_datediff)
 
 	var/datum/db_query/query_ip = SSdbcore.NewQuery("SELECT ckey FROM erro_player WHERE ip = '[address]'")
+	if(!query_ip.Execute())
+		qdel(query)
+		return
 	query_ip.Execute()
 	related_accounts_ip = ""
 	while(query_ip.NextRow())
@@ -487,6 +495,9 @@ GLOBAL_LIST_INIT(blacklisted_builds, list(
 	qdel(query_ip)
 
 	var/datum/db_query/query_cid = SSdbcore.NewQuery("SELECT ckey FROM erro_player WHERE computerid = '[computer_id]'")
+	if(!query_cid.Execute())
+		qdel(query)
+		return
 	query_cid.Execute()
 	related_accounts_cid = ""
 	while(query_cid.NextRow())
diff --git a/code/modules/client/preference_setup/loadout/01_equipment.dm b/code/modules/client/preference_setup/loadout/01_equipment.dm
index de33fdeb03..8a0fb78baa 100644
--- a/code/modules/client/preference_setup/loadout/01_equipment.dm
+++ b/code/modules/client/preference_setup/loadout/01_equipment.dm
@@ -39,7 +39,7 @@
 	character.all_underwear_metadata.Cut()
 
 	for(var/underwear_category_name in pref.all_underwear)
-		var/datum/category_group/underwear/underwear_category = global_underwear.categories_by_name[underwear_category_name]
+		var/datum/category_group/underwear/underwear_category = GLOB.global_underwear.categories_by_name[underwear_category_name]
 		if(underwear_category)
 			var/underwear_item_name = pref.all_underwear[underwear_category_name]
 			character.all_underwear[underwear_category_name] = underwear_category.items_by_name[underwear_item_name]
@@ -65,7 +65,7 @@
 	if(!istype(pref.all_underwear))
 		pref.all_underwear = list()
 
-		for(var/datum/category_group/underwear/WRC in global_underwear.categories)
+		for(var/datum/category_group/underwear/WRC in GLOB.global_underwear.categories)
 			for(var/datum/category_item/underwear/WRI in WRC.items)
 				if(WRI.is_default(pref.identifying_gender ? pref.identifying_gender : MALE))
 					pref.all_underwear[WRC.name] = WRI.name
@@ -75,7 +75,7 @@
 		pref.all_underwear_metadata = list()
 
 	for(var/underwear_category in pref.all_underwear)
-		var/datum/category_group/underwear/UWC = global_underwear.categories_by_name[underwear_category]
+		var/datum/category_group/underwear/UWC = GLOB.global_underwear.categories_by_name[underwear_category]
 		if(!UWC)
 			pref.all_underwear -= underwear_category
 		else
@@ -95,7 +95,7 @@
 	var/list/data = ..()
 
 	var/list/underwear_data = list()
-	for(var/datum/category_group/underwear/UWC in global_underwear.categories)
+	for(var/datum/category_group/underwear/UWC in GLOB.global_underwear.categories)
 		var/item_name = LAZYACCESS(pref.all_underwear, UWC.name) || "None"
 
 		var/list/tweaks = list()
@@ -183,7 +183,7 @@
 				return TOPIC_REFRESH_UPDATE_PREVIEW
 
 		if("change_underwear")
-			var/datum/category_group/underwear/UWC = LAZYACCESS(global_underwear.categories_by_name, params["underwear"])
+			var/datum/category_group/underwear/UWC = LAZYACCESS(GLOB.global_underwear.categories_by_name, params["underwear"])
 			if(!UWC)
 				return
 			var/datum/category_item/underwear/selected_underwear = tgui_input_list(user, "Choose underwear:", "Character Preference", UWC.items, pref.all_underwear[UWC.name])
diff --git a/code/modules/mining/ore_redemption_machine/equipment_vendor.dm b/code/modules/mining/ore_redemption_machine/equipment_vendor.dm
index d76f315238..f27f457739 100644
--- a/code/modules/mining/ore_redemption_machine/equipment_vendor.dm
+++ b/code/modules/mining/ore_redemption_machine/equipment_vendor.dm
@@ -168,6 +168,7 @@
 	if(inserted_id && !powered())
 		visible_message(span_notice("The ID slot indicator light flickers on \the [src] as it spits out a card before powering down."))
 		inserted_id.forceMove(get_turf(src))
+		inserted_id = null
 
 /obj/machinery/mineral/equipment_vendor/update_icon()
 	if(panel_open)
@@ -307,6 +308,7 @@
 /obj/machinery/mineral/equipment_vendor/dismantle()
 	if(inserted_id)
 		inserted_id.forceMove(loc) //Prevents deconstructing the ORM from deleting whatever ID was inside it.
+		inserted_id = null
 	. = ..()
 
 /**
diff --git a/code/modules/mob/living/carbon/human/human.dm b/code/modules/mob/living/carbon/human/human.dm
index aeda7483d9..8d81901b98 100644
--- a/code/modules/mob/living/carbon/human/human.dm
+++ b/code/modules/mob/living/carbon/human/human.dm
@@ -58,7 +58,7 @@
 	. = ..()
 
 	hide_underwear.Cut()
-	for(var/category in global_underwear.categories_by_name)
+	for(var/category in GLOB.global_underwear.categories_by_name)
 		hide_underwear[category] = FALSE
 
 	if(dna)
@@ -1617,7 +1617,7 @@
 	set category = "Object"
 
 	if(stat) return
-	var/datum/category_group/underwear/UWC = tgui_input_list(usr, "Choose underwear:", "Show/hide underwear", global_underwear.categories)
+	var/datum/category_group/underwear/UWC = tgui_input_list(usr, "Choose underwear:", "Show/hide underwear", GLOB.global_underwear.categories)
 	if(!UWC) return
 	var/datum/category_item/underwear/UWI = all_underwear[UWC.name]
 	if(!UWI || UWI.name == "None")
diff --git a/code/modules/mob/living/carbon/human/human_bellies.dm b/code/modules/mob/living/carbon/human/human_bellies.dm
index 2720b4b2a2..5619bd27ac 100644
--- a/code/modules/mob/living/carbon/human/human_bellies.dm
+++ b/code/modules/mob/living/carbon/human/human_bellies.dm
@@ -8,7 +8,7 @@
 	//update_vore_belly_sprite()
 	var/list/new_fullness = ..(TRUE)
 	. = new_fullness
-	for(var/datum/category_group/underwear/undergarment_class in global_underwear.categories)
+	for(var/datum/category_group/underwear/undergarment_class in GLOB.global_underwear.categories)
 		if(!new_fullness[undergarment_class.name])
 			continue
 		new_fullness[undergarment_class.name] = -1 * round(-1 * new_fullness[undergarment_class.name]) // Doing a ceiling the only way BYOND knows how I guess
diff --git a/code/modules/mob/living/carbon/human/inventory.dm b/code/modules/mob/living/carbon/human/inventory.dm
index eb7a85a833..4826f599cf 100644
--- a/code/modules/mob/living/carbon/human/inventory.dm
+++ b/code/modules/mob/living/carbon/human/inventory.dm
@@ -439,6 +439,6 @@ This saves us from having to call add_fingerprint() any time something is put in
 			continue
 		drop_from_inventory(equipped_thing)
 	if(remove_underwear)
-		for(var/datum/category_group/underwear/UWC in global_underwear.categories)
+		for(var/datum/category_group/underwear/UWC in GLOB.global_underwear.categories)
 			hide_underwear[UWC.name] = TRUE
 		update_underwear(1)
diff --git a/code/modules/mob/living/carbon/human/stripping.dm b/code/modules/mob/living/carbon/human/stripping.dm
index c5c75d0d41..263fcbf3b9 100644
--- a/code/modules/mob/living/carbon/human/stripping.dm
+++ b/code/modules/mob/living/carbon/human/stripping.dm
@@ -54,7 +54,7 @@
 			update_inv_w_uniform()
 			return
 		if("underwear")
-			var/datum/category_group/underwear/UWC = tgui_input_list(user, "Choose underwear. (Do not do this without OOC permission from the other player)", "Show/hide underwear", global_underwear.categories)
+			var/datum/category_group/underwear/UWC = tgui_input_list(user, "Choose underwear. (Do not do this without OOC permission from the other player)", "Show/hide underwear", GLOB.global_underwear.categories)
 			if(!UWC) return
 			var/datum/category_item/underwear/UWI = all_underwear[UWC.name]
 			if(!UWI || UWI.name == "None")
diff --git a/code/modules/mob/living/simple_mob/subtypes/mechanical/mecha/mecha.dm b/code/modules/mob/living/simple_mob/subtypes/mechanical/mecha/mecha.dm
index 96aa77a299..cd6423bbf6 100644
--- a/code/modules/mob/living/simple_mob/subtypes/mechanical/mecha/mecha.dm
+++ b/code/modules/mob/living/simple_mob/subtypes/mechanical/mecha/mecha.dm
@@ -66,7 +66,7 @@
 	..(0,"explodes!") // Do everything else first.
 
 	// Make the exploding more convincing with an actual explosion and some sparks.
-	sparks.start()
+	sparks?.start()
 	explosion(get_turf(src), 0, 0, 1, 3)
 
 	// 'Eject' our pilot, if one exists.
diff --git a/code/modules/nifsoft/nif.dm b/code/modules/nifsoft/nif.dm
index a202b19de6..7830cb716a 100644
--- a/code/modules/nifsoft/nif.dm
+++ b/code/modules/nifsoft/nif.dm
@@ -107,8 +107,9 @@ You can also set the stat of a NIF to NIF_TEMPFAIL without any issues to disable
 
 //Destructor cleans up references
 /obj/item/nif/Destroy()
-	unregister_human()
-	human = null
+	if(human)
+		unregister_human()
+		human = null
 	QDEL_LIST_NULL(nifsofts)
 	QDEL_NULL(comm)
 	nifsofts_life.Cut()
diff --git a/code/modules/projectiles/targeting/targeting_overlay.dm b/code/modules/projectiles/targeting/targeting_overlay.dm
index 46281e3508..6cab0459b1 100644
--- a/code/modules/projectiles/targeting/targeting_overlay.dm
+++ b/code/modules/projectiles/targeting/targeting_overlay.dm
@@ -105,7 +105,7 @@
 		qdel(src)
 		return
 
-	if(!aiming_at)
+	if(QDELETED(aiming_at))
 		cancel_aiming()
 		return
 
diff --git a/code/modules/vore/eating/belly_import.dm b/code/modules/vore/eating/belly_import.dm
index 65407aea90..e023050695 100644
--- a/code/modules/vore/eating/belly_import.dm
+++ b/code/modules/vore/eating/belly_import.dm
@@ -744,12 +744,12 @@
 		if(istext(belly_data["undergarment_chosen"]))
 			var/new_undergarment_chosen = sanitize(belly_data["undergarment_chosen"],MAX_MESSAGE_LEN,0,0,0)
 			if(new_undergarment_chosen)
-				for(var/datum/category_group/underwear/U in global_underwear.categories)
+				for(var/datum/category_group/underwear/U in GLOB.global_underwear.categories)
 					if(lowertext(U.name) == lowertext(new_undergarment_chosen))
 						new_belly.undergarment_chosen = U.name
 						break
 
-		var/datum/category_group/underwear/UWC = global_underwear.categories_by_name[new_belly.undergarment_chosen]
+		var/datum/category_group/underwear/UWC = GLOB.global_underwear.categories_by_name[new_belly.undergarment_chosen]
 		var/invalid_if_none = TRUE
 		for(var/datum/category_item/underwear/U in UWC.items)
 			if(lowertext(U.name) == lowertext(new_belly.undergarment_if_none))
diff --git a/code/modules/vore/eating/panel_databackend/vorepanel_set_attribute.dm b/code/modules/vore/eating/panel_databackend/vorepanel_set_attribute.dm
index fba180f2b6..333aa6e0d3 100644
--- a/code/modules/vore/eating/panel_databackend/vorepanel_set_attribute.dm
+++ b/code/modules/vore/eating/panel_databackend/vorepanel_set_attribute.dm
@@ -990,13 +990,13 @@
 			. = TRUE
 		if("b_undergarment_choice")
 			var/new_undergarment = params["val"]
-			if(!(global_underwear.categories_by_name[new_undergarment]))
+			if(!(GLOB.global_underwear.categories_by_name[new_undergarment]))
 				return FALSE
 			host.vore_selected.undergarment_chosen = new_undergarment
 			host.handle_belly_update()
 			. = TRUE
 		if("b_undergarment_if_none")
-			var/datum/category_group/underwear/UWC = global_underwear.categories_by_name[host.vore_selected.undergarment_chosen]
+			var/datum/category_group/underwear/UWC = GLOB.global_underwear.categories_by_name[host.vore_selected.undergarment_chosen]
 			var/selected_underwear = UWC.items_by_name[params["val"]]
 			if(!selected_underwear) //They cancelled, no changes
 				return FALSE
diff --git a/code/modules/vore/eating/panel_databackend/vorepanel_vore_data.dm b/code/modules/vore/eating/panel_databackend/vorepanel_vore_data.dm
index 5346605e29..5f6bf5961c 100644
--- a/code/modules/vore/eating/panel_databackend/vorepanel_vore_data.dm
+++ b/code/modules/vore/eating/panel_databackend/vorepanel_vore_data.dm
@@ -269,7 +269,7 @@
 				for(var/flag_name in selected.vore_sprite_flag_list)
 					UNTYPED_LIST_ADD(vs_flags, list("label" = flag_name, "selection" = selected.vore_sprite_flags & selected.vore_sprite_flag_list[flag_name]))
 
-				var/datum/category_group/underwear/UWC = global_underwear.categories_by_name[host.vore_selected.undergarment_chosen]
+				var/datum/category_group/underwear/UWC = GLOB.global_underwear.categories_by_name[host.vore_selected.undergarment_chosen]
 				var/list/undergarments
 				if(UWC)
 					undergarments = UWC.items
@@ -299,7 +299,7 @@
 				"belly_sprite_options" = host.vore_icon_bellies,
 				"undergarment_chosen" = selected.undergarment_chosen,
 				"undergarment_if_none" = selected.undergarment_if_none || "None",
-				"undergarment_options" = global_underwear.categories,
+				"undergarment_options" = GLOB.global_underwear.categories,
 				"undergarment_options_if_none" = undergarments,
 				"undergarment_color" = selected.undergarment_color,
 				"tail_option_shown" = ishuman(owner),