Man you guys are lightweights when it comes to sleep deprivation.
Seriously... I used to pull all-nighters for fun... I wouldn't feel any negative effects until I pulled two in a row. I've gone three days in a row without sleep probably a few dozen times in my life, mostly in my teen years. Never suffered hallucinations or anything.
My record was an unintentional thing caused by anxiety. I went on a trip with my family and my best friend of three years, who I'd known exclusively online up to that point, just happened to be on the way. We took the detour to see her on both our way out and our way back. This was after 8 years of not having any friends in real life. I was a fucking mess. The trip was a week long and I barely slept or ate the entire time. I didn't sleep at all the first three nights, managed to get about three rough hours of sleep the 4th night, and then didn't sleep at all for another three straight days. The lack of food or sleep didn't get to me at all, though. I never had any sort of hallucinations and I don't even look tired in the pictures. I was just fritzed out on pure emotional energy and anxiety. Yeah... she broke contact with me shortly after that.
What really broke me was my first full college semester as a parent. I averaged four hours of sleep a night for four straight months, and mixed at least a dozen all-nights in that period as well, with a couple of those being consecutive. By the end of it, I was randomly falling asleep on my feet, and the only way I could stay awake while driving was by screaming at the top of my lungs. I have never fully recovered from that period, and it was 8 years ago.