<p>Aside from many of the rooms before the bosses (where the lever is) as you said, the <strong>boss rooms </strong>themselves are also blocked from cubing out.</p>out.</p><p>Edit: If you swear at King Tibianus during the Kingsday mini world change, you end up in <strong>Thais Jail</strong>, from which you cannot either teleport out of there, or log out there.</p>