text:  deprived of oxygen. Often people are dehydrated. They're often in balances of the iron balance in their blood. Yeah, so their brain is quite perturbed and it's actually very common. In fact, historically, you know, people have worked hard to get to that state. You know, the Knights of the Round Table, when they set off to find the Holy Grail, what did they do? Well, they stayed awake all night praying and starving themselves. So eventually they would get visions.