Yesterday, learning for a whole day in the classroom from 9:00 am to 21:30 pm made me so tiled as to generate a creepy illusion when I went to the lavatory in the evening. The corridor in the public building on the second floor is very black every evening and there is only a light beside the WC at the end of it.

The building will be closed at 9:30. However, when I glimpsed my watch, it was thirty five past nine. So I put away my books quickly and told my girl to take it outside to wait for me and I went to the lavatory by myself. However, just as I walked directly to the corner and turn left, I was dazzled and I saw many gray bubbles integrated together coming to me, then I closed my eyes quickly. When I open my eyes again, I found that two students were talking at the end of the corridor……