I'd suck at staying up. I think the longest I ever did was 25hrs. Got home from work, and the basement was flooding. Water was seeping in through cracks in the foundation, and the sump pump opted to stop working. It was sucking up electricity, but it wasn't doing anything. I jiggled the output pipe, and it just started working.
So, that day was spent salvaging stuff that had been set on the floor (the basement floods periodically, up to about 1.5" deep, so a lot of stuff is on 2x4's), and cleaning up the mess with a mop and Shopvac.
At the end of that, yeah, only 25hrs, but I was starting to act like I probably would if I'd be drunk, and I was starting to see things that weren't there. So yeah, acting drunk, hallucinating, coordination problems, it was time for bed. Think I slept for 14 hours straight then. If it gets much past maybe 18 hours awake, I start to act funny. This delicate little brain of mine needs too damn much sleep or else it just freaks out.