From what I gather, a person can go without sleep for quite long, in some cases 5+ days. Obviously, the mind and body become weak and apparently after 72 hours, you experience dreams while you are awake, so you are in 2 worlds at once. (Cheaper than drugs, eh?)
I ask because I have a lot of work to do over the next 2 weeks, with the parties I have to attend during the holiday period and all the work I need to get done I find very little time for sleep. I can do 36 hours easily with the help of some caffeine but 48 hours is a struggle?
I am sure some people on here must have cracked 48 hours!
PS. Kids, don't try sleeping longer than 72 hours just for the hallucinations!