After trying for a week I did this yesterday for the first time, passing out. It's the key I think. So sitting down I did it kneeling- you hyperventilate, breathing in through your nose and out through your mouth hard for 10 counts, then quickly stand up, fully or onto your knees. And then clamp your nose as if you're trying to pop your ears and hold for 10 counts. Exhale hard against closed nose, abs tense. No air escapes. I made it for eight counts and it was wild, my first time passing out ever in my life. I just stood up onto my knees, on my bed so I was safe.
Did it again today to make sure it wasnt a one off.
Don't try to even practicing with the rope noose on unless you're ready to go. If the rope isn't tied at the other end, you should be safe but you never know and it's not worth it… Sadly, I'm terrified but I'm going to be doing this on Monday. I'm not testing it out beforehand. It's pretty surreal but here we are. As long as the rope holds, it should be a pretty painless way to go.