A terrible feel........

I feel I have good spirit today. Although I slept very late yesterday night, I felt I was excited in this morning. But why am I so active? Actually I also confused for the reason of my behavior today. Because I feel my body is tired and weak, I need to have a little rest. Whatever I tried to let my eyes close again and again, but I still could not fall in a sleep in the rest time after the lunch . In the end, I eventually really slept, but it was happened in math class.