Why did Charley rush back from the third level?

Charley knew that there were only two levels at Grand Station. In his fantasy he visited the Third Level as well. There he felt a strange mystery of 1894. Therefore, he consulted a psychiatrist. The psychiatrist thought that Charley had been day-dreaming. Side by side he revealed that the third level was still there. In reality Charley got upset with his dull life. It made him rush back from the third level.