What happens when you don't get any sleep at all?

My longest period of not sleeping was 6 and a half days done purely to see how long I could if I forced it. It's really not bad if you force cafein and sugar constantly and keep yourself occupied as boredom = the end after 3 days or so. You also really learn about your natural cycles and when your second winds come in as they will give you the energy to relax a bit for an hour or two with less risk of passing out. Lets see after about 2 and a half days I was getting audio halucinations of people talking at me from behind. At about 5 I started seeing things moving in my peripheral vision regularly with the occasional flash of motion darting in front of me. At the last bit I was roughly a zombie in that I could barely respond to anything. I could understand everything that happened around me but reacting to it was nearly impossible. I probably could have forced it to a full 7 days but I was in summer school and working at the time and I had become completely useless at both so I figured I'd best just get back to normal. Course back then I used to sleep roughly 4 hours every other night so I had a lot of practice at the whole thing.

Jam it back in, in the dark.