I had a friend who did Uberman once. It was hard to be around him at times because he would sometimes very rapidly deteriorate into sleep as he approached one o

I had a friend who did Uberman once. It was hard to be around him at times because he would sometimes very rapidly deteriorate into sleep as he approached one of his sanctioned sleeping periods. Aside from those sanctioned sleeping periods, I'd estimate he was maybe a third actually-awake about seventy percent of the time.