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People in the experiment were deemed unconcious from 1.6 seconds to almost 10 seconds after the choke began. Others were not choked out after 20 seconds. If you held the person who was unconcious after 1.6 seconds for another 8 or 9 seconds, you could cause permanent brain damage or death.
The longest record for a man holding his breath underwater and remaining conscious is about 10 minutes http://news.xinhuanet.com/english/2007-1... . However, in cases of drowning, after passing unconscious, you can survive about 12 minutes (I believe) before you risk brain death.However, in certain cases, children who have fallen into very cold water have survived over an hour without air.owever, in cases of drowning, after passing unconscious, you can survive about 12 minutes (I believe) before you risk brain death. However, in certain cases, children who have fallen into very cold water have survived over an hour without air.