Mine

        if (getNpcId() == 10035 || getNpcId() == 10054 || getNpcId() == 10126
                || getNpcId() == 10220)
        {
            int boxId = 0;
            switch(getNpcId())
            {
                case 10035: // Shilen?s Messenger Cabrio
                    boxId = 8027;
                    break;
                case 10054: // Demon Kernon
                    boxId = 8028;
                    break;
                case 10126: // Golkonda, the Longhorn General
                    boxId = 8029;
                    break;
                case 10220: // Death Lord Hallate
                    boxId = 8030;
                    break;
            }
            
            L2NpcTemplate boxTemplate = NpcTable.getInstance().getTemplate(boxId);
            final L2NpcInstance box = new L2NpcInstance(IdFactory.getInstance().getNextId(), boxTemplate);
            box.spawnMe(this.getX(), this.getY(), this.getZ());
            
            
            ThreadPoolManager.getInstance().scheduleGeneral(new Runnable() {
                public void run()
                {
                    box.deleteMe();
                }
            }, 60000);
        }