Quote Originally Posted by Gandalf_The_Grey
I don't know if it's that particular Vietnamese guy, but I did hear about a guy who had a medical condition that didn't allow him to sleep. He kept sane and functional by practicing meditation several hours a day, which has already been proven to work as a substitute for sleep. Buddha himself only slept 2 hours a night, plus 2 hours sitting meditation, and 2 hours walking meditation.
Alot of us only sleep 2-4 hours a night I dont even sleep at night I sleep in the mornig day. meditaion is all that is needed to stay sane, although healing is not done very well unles you are in rem sleep. 1 hour of rem sleep is like 4-5 hours of awake time as far as healing goes. Their are deprivation chambers wich even speed heeling and sleep up to five times faster. Instead of 8 hours a night sleep 3-5 hours is all that is needed. These chambers are very expensive and owend buy athletes, theripest, and the rich. You will not go insane if your mind is strong enough and disipled to addaped. Their are stories of sober men who go out and are up for a week or more and are constanly in danger or moving never resting and they never had a episode or halucinations, but remained sharp and agile. This can be acheive same as night vision without optics can be acheived. Here is a link to those Iso. Chambers I think their kool cause pepole who are experianced Iso Chamber users claim they have outa body experiances and very interesting stories. Almost like they were on halusonagens.

Samadhi Tank - Origins