It's currently about 11:30pm on a Friday and I've been awake since 2pm the previous day. I got 2 hours of sleep Wed. night, went to my Thurs. morning classes and then slept from 9am to 2pm. I pulled an all-nighter last night so I wasn't able to get any sleep. I had a long day of classes and yet I am sitting here at my computer not sleepy at all, a bit worn out but not really sleepy. I'm surprised since I was pretty sleepy in the morning. I haven't taken any naps or anything since I woke up about 33 hours ago, I had a couple of chances but was not tired enough at the time to do so. I also have not had a single drop of coffee, pep pills, or anything like that. At most I had a can of Diet Coke with my lunch. When I pull the rare all nighter, I am always tired as hell the next day but that was not the case today. I'm really confused as how I am able to remain awake and alert.