Full suspension. Maybe try to compress the arteries before kicking the chair by kneeling on it like (one leg kneels in the air) I did. It's the only method that is completely resistant to convulsions. (I've seen some "hanging" videos in the past, and the convulsions can be pretty violent for a minute or two. I don't think hanging by sitting from a doorknob will work). I do have a thin neck. I don't know how this would work for big necks. Position 2 should also be good enough to fight convulsions.
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The second position in this picture looks risky imo. If I wanted to try partial suspension nowadays, I would only use the first position in the picture bellow.
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This position is what I call "
Position 2" (There's another picture with more hanging poses that I can't find right now, with 4 postions I think, the first position being full suspension, the second is the first one in this picture above), position in which the person can get enough pressure to compress the arteries by barely touching the ground with his bented legs. The second position in the picture is called "Position 3" It can be good enough to make you pass out. I wouldn't bet on it keeping me unconscious for 20 minutes though. But I've seen some videos where it worked, so I don't know. I still think that position 3 isn't 100% reliable. Play it safe. You can't take any risks. You don't want any brain damage.