Goddamned insomnia!
Why is it that I can work a 14+ hour day on less than five hours of sleep, and then not be able to get to sleep when I go to bed? At 12:30 in the morning? I've been up for over 19 hours fer chrissakes, and worked myself into looniness. And it's not like I'm really awake enough to do anything; I just can't get to sleep. I swear, one of these days I'm just going to pass out while I'm walking to class or something to try to make up for the sleep I'm not getting at night.