saddly, the longest i've stayed up is because of newgrounds. stayed up over two whole days (first day was clockday, had to be up all 24 hours to get all b/p points :P) and i started freaking out when i was looking at the portal. i got super paranoid, and started hearing things. my eyes were playing tricks on me, and i was irritable :P
don't really remember falling asleep, just kinda collapsed on the ground next to me.
i'm not quite an insomniac, i usually get to sleep by the time i see the sun comming up, so i guess i'm a wuss :(
get some sleep, kids ;)