Getting too little sleep can have serious health consequences (2013)
I once, involuntary, went without sleep for around 72 hours. I was at a music festival and we were either pulling through the night or I couldn't sleep because of the noise. When the time came to go home, I really felt pretty good. At that time I had been awake for around 60 hours. My body was tired and my thinking was a bit sluggish, but nothing too bad...Until I got home and tried to sleep. By then I was feeling dead-tired, but I simply couldn't sleep. This wasn't your average "Oh I can't sleep, guess I'll do something else and try again later" case of 'insomnia'. I was so extremely tired; all I wanted was to sleep. I started having hallucinations much like the early stages of a mushroom trip (minus the fun). My eyes couldn't focus, I couldn't think.Finally I managed to fall asleep (while constantly suppressing panic attacks; something I've suffered from in the past and know how to deal with now). I had lucid dream after lucid dream during that sleep. It was very unsettling as I got the feeling (during lucid dreaming) that I wasn't getting any "real" sleep and I'd go insane.All in all the lucid dreaming aspect was pretty cool, and in retrospect perhaps worth the unsettling experience of being awake so long. But I'll never ever want to repeat that experience.