Fatigue

Being tired is the worst. I realize that there are far more awful things than lack of sleep, but go with it, for the sake of this post.

I think we've all felt that horror in class when you realize you have no idea how long your eyes have been closed and you jerk back into consciousness.

The struggle to keep your head up and your eyes open is difficult enough.  

Eventually, some of us succumb to the weight of our eyelids. The room is warm. Your professor's voice is deep and soporific. And then I don't know what happens, really. I've never fallen asleep in class. But then you're the guy I'm not sure whether to poke or not. 

You might try napping before that class (philosophy) you can't stay awake in. But the nap will only make you more tired. Thanks a lot, brain. That was helpful. 

When you get out of class, you take a longer nap, and it feels wonderful. A success. Until later that night when you realize it's the reason you can't fall asleep. 

And you wake up beautiful.