When Lex disappeared, he teleported directly to his room. He told Mary to let him know if something required his attention, for example if all the rooms were booked and he needed to create more rooms, but otherwise he should not be disturbed. He realized that he was having severe mood swings, and needed to calm down. He sat down cross legged on his bed and started trying to meditate. It was not a skill he had mastered yet, and it usually took him some time before he could enter a state of meditation. Yet whenever he was able to meditate it helped his mental state tremendously.