Damn, i don't have the +1 appropriate thumb.

I had some friends in college try this. They explained that after 72 hours your mind says "enough of this shit" and starts producing living dreams.

You think you're having a conversation, reading a webpage, etc. but you aren't. You've fallen asleep, and there's no way for you to tell the difference, even after someone has woken you up. Your mind just creates a new story, you think consciousness is continuing on, but you're back to sleep.

You awaken to you, and other participants, asleep. Anyone hired to keep you awake didn't want to hurt you, after slapping you silly, and eventually left.

I stayed awake for 3 days once in college. I didn't notice any interesting effects other than being tired. Granted I was having a bit of a nervous breakdown at the time.

Not even close to anything like 72 hours, but on one occasion I was telling my daughter an invented story before her bed time. I was really exhausted and tried to convince her she didn't need a story (failed) and ended up falling asleep (but still talking) mid-sentence. I would snap-to again after realizing the sentence had diverted off into utter nonsense, the product of whatever weird near-sleep hallucinations I was having. This happened 3 or 4 times before she finally agreed that I needed to go to sleep and I cut the story short.

I have apnea (can't breathe properly when asleep so I keep waking up), and for the 25 years before I was diagnosed/treated I was a zombie from sleep deprivation. Dozing off if I sat still for too long, forgetful, overlooking details (went to school in my pajamas a few times) and absolutely horrific hallucinations/nightmares. Best explanation I can give is that the dreaming part of my brain didn't care whether I was asleep or not, and would try to force its narrative on top of whatever I was seeing. So I would feel fully awake and lucid, able to see that a hallway was clear, but part of my brain was positive that it was full of spiders. No visual hallucination, just a whisper of a different reality and my imagination doing the rest of the work.

Not fun. Even with treatment now I sometimes slip into that nightmare state if awoken suddenly, but these days I recognize it and can ride it out.

I think my record is 41 hours. Things started to look weird. Pavement and writing on a chalkboard were blue instead of their proper color. All I wanted to do was go to sleep.

Four straight days in one of those shit seminars to improve your life and get rid of all the shit. Had amazing visions of angels, churches on hills, and a man in an old coach that they told me was God. I also had respiratory failure. I would stare at a table and see people in the movies, a map of Utah and wheat fields from the sky. Now, If I don't sleep, I get really nervous to the point of getting paranoid if the bus is too full of people. I feel like I am going to have an attack.
It all ends if I sleep for about half an hour, like my brain just resets itself. Right now I just sleept four hours, but I am just a bit dozey and so far I am doing fine. But I am affraid to go to the toilet, because sometimes I fall sleep while pooping (I am sorry to admit it, but it happens) if I am really tired.

The older I get, the less I miss staying up real late. I’d be lucky enough to sleep uninterrupted for 8 hours. Earplugs, eye covers, and probably some sleeping aid will do.

Catnapping the whole time is interesting.

In the anime, Kado: The Right Answer, an anisotropic being (outside our space time) subjected a human to experience and be aware of dimensions above space time.

Supposedly, we exist above spacetime. We just can’t experience it. By experiencing it, we have multiple selves always tethered to our space time, but can be responsible for physical/mental/psychological function.

If we chose to, we don’t have to sleep anymore. Sleeping can be relegated to another self to process the information gather in spacetime.

It’s an interesting concept.