"I have had oxygen deprivation and I never had any visions. Is there any study that shows at what levels of oxygen deprivation one might "see" things? Any data on those who have been strangled, put in a sleeper hold or drowned?"
Actually, quite a bit. I only googled for one, but I'm sure a smart guy like you can find more. That's assuming you are more interested in a scientific answer than trolling people who don't have your religious beleifs.
When mountain climbing, hypoxia causes hallucinations, for example.
http://www.pbs.org/wgbh/nova/everest/exposure/hackett.html "I could share some of my own experiences with this kind of hypoxia on Everest. One time, when I was sleeping in my tent and ran out of oxygen during the night at about 25,000 feet, I had this most vivid hallucination that John West, our expedition leader, had come up to the camp with a full bottle of oxygen, with no regulator on it. He had put it inside the tent and just opened it and filled the whole tent with oxygen. I was very grateful for him. I felt better right away. And the next morning, I was trying to figure out where the bottle was and how he had gotten up there in the middle of the night."
"It dawned on me that obviously this was a hallucination and I knew I wasn't dreaming because it was so incredibly vivid."
Conclusion: John West is really god! duh.
but I'm sure a smart guy like you can find more. That's assuming you are more interested in a scientific answer than trolling people who don't have your religious beliefs. A little passive aggressive are we? I asked if there were studies. period.
Is there any study that shows at what levels of oxygen deprivation one might "see" things?
You were matter of fact about it so I figure you have some medical study under your hat. Anecdotal evidence of a hallucination or a "spiritual" experience really have no value.
Post 101 gave me an actual study, that is helpful, an actual medical study - not anecdotal "hallucination" stories.