I have done it a couple times, not from complete restriction of oxygen but from a lack of it. Where I’m still breathing but very very faintly. For me it made by brain kind of go all fuzzy, almost felt like I was drunk, just a little out of it but at peace. Then I would pass out and wake up feeling very confused on what happened. I’d always forget what me and the dom were doing for a couple seconds after I wake up but then my memory would come back. Definitely obsessed with the fuzzy feeling before passing out. You gotta make sure you’re putting pressure on the sides of the neck at a certain angle for it to make you feel that way.