I've recently read,well several times something I somehow found in scribt I think that is a guide to partial suspension and pretty well written and researched. Lots of "what works for some won't work for others". He suggests below the Addams apple about a finger or 2, fwiw.
I've tried uno times and nowhere near passing out within a minute - he says to abort if not out within a minute.
I have this feeling, sorta like with everything I seem to donor be or feel for quite awhile, that I also am one who just won't pass out. I tried the hyperventilate/hold your breath and not even close.
That was my way of- simple, quick and even I learned how to properly tie knots. The set up was good - I just can't pass out or even get close.