A friend who used to Dj/party in berlin had several weekends where he was awake for 2-3 days. He said that by Sunday, everything was possible. For him it was audible hallucinations. He had to go to therapy after doing that for 6 years. Could also be connected to all the stimulants he used to take
For the record, comments in this thread that may seem contrary, stimulants are bad things, pulling all-nighters or back-to-back all-nighters (or more) on stimulants are bad things, study drugs fall into this category of bad things, please guys be safe and don't be stupid and don't snort your adderal so you can "study harder." All those drugs do is make you feel better about your performance, they don't improve it. So yeah, I completely believe your friend had to go to therapy after doing that for six years, and I'm sure the stimulants didn't have nothing to do with it. When you live on drugs as a part of your regular lifestyle it's very hard to learn how to stop.
My personal "best" is just around 72 hours at a rock festival, it was the first time I discovered Red Bull & Vodka. Morning yoga helped as well. Put the powder down and stretch your hamstrings like a man.