buckleupdorothy: I am awful at staying awake. Even if I've slept good the night before. My body is very biorhythmic...I get hungry at the same time each day, and at bedtime, my body is READY to go to sleep.
I have not been in a situation where I have HAD to stay awake for quite a long time. I remember back in college when I was pledging for a sorority (never would I do that today!) part of our "hell" weekend was staying awake all Friday night until around midnight on Saturday night. Though it was years ago, I remember I was so exhausted that I just sobbed.
When studying for exams in college, late at night, I took NoDoz. Big mistake. The side effects gave me the shakes, diarrhea and dizziness.
Sleep deprivation makes me very weepy, and I can't tolerate very much either.
So, in answer to your question, if it happened now, I would probably stay on my feet, walk, and drink caffeine. And crave getting into bed.
Blessings, Sparklea :)