INDESTRUCTIBLE objects are no longer affected by explosions

code/game/objects/obj_defense.dm

@@ -48,6 +48,8 @@
 	take_damage(tforce, BRUTE, "melee", 1, get_dir(src, AM))
 
 /obj/ex_act(severity, target)
+	if(resistance_flags & INDESTRUCTIBLE)
+		return
 	..() //contents explosion
 	if(target == src)
 		qdel(src)
@@ -256,4 +258,4 @@ GLOBAL_DATUM_INIT(acid_overlay, /mutable_appearance, mutable_appearance('icons/e
 	if(can_break && integrity_failure && current_integrity <= integrity_failure)
 		obj_break(damage_type)
 		return TRUE
-	return FALSE
+	return FALSE