Wow I've been sitting on this for a couple years. Alright this is not a scientific description and does not contain any physiological explanations, just my layman's experience. The attempt that night was impulsive reaction to some bad news earlier that day which sent me over the edge with the other bullshit I was dealing with. I have never put it into words and hope I can relay best as possible the event.
After kicking the stool from under my feet things began happening instantly. I had a plastic bag fastened around my neck and proper hangmans noose fashioned out of a sturdy scarf around the neck at an angle decided on upon previous research. So-bowels began seizing and loosening immediately. It did not hurt but inside that whole part of my body felt like one of the balloon artists fucking with every single foot of all intestines. I could feel my sphincter or rectum, what ever is at the very end pulsing like crazy, again, no pain but the sensations with that whole.... internal party were very finely felt.
At the same time Terra forming is going on down south up in the noggin I've got flashing bright lights in a dark background. It was like synapses exploding. None of this hurt. There were streaks of yellow of whatever was burning out and at the end of this streak were the bursts of primary colors- the explosion. They went in all directions and did not appear to interact with each other. I do not know if this was brain cells dying or parts of the brain reacting like that in a cry for oxygen or from my eyes. I had no control over this process. I was not scared, I remember feeling like 'what should I do?' During this time I was aware of my situation and was knew things would progress extremely fast. My awareness did not reach beyond my bowels, brain activity and the weird bad feeling I had.
I believe my eyes were closed because the blackness and explosions were the only thing I remember seeing. Everything happened do fast but there was this feeling inside of me. My chest, some feeling clawed out of me and I began to swing and shake to reach the stool, which I did. I was hanging from a ceiling fan on a low ceiling. With my hands self tied behind my back, tied ankles and knees I was able to get enough leverage with the stool to wrench my wrist scarf loose and I don't remember how I got free after that. All I remember is trying to get the stool so I could stand on it and release pressure on my neck.. Real life Indiana Jones and that goddammit grail. I can't even believe I'm saying it but it's true. All after ingesting 2 large bottles one vodka one sake and about 80 pharmaceutical pills. I REALLY can't believe I'm saying this either but I guess I didn't want to die right then although I almost did in the days after.
The experience was and remains very clear to me. The time immediately after and days afterwards are a different story
Sorry for the lengthy reply, it's not much but hopefully it answers something or gives reference. I know 100% if I had waited longer or not at all to swing that would have been a successful attempt. I do know what I would improve for next time though. If you are interested in what I remember from the 'fog' afterwards, I can provide a description of that as well.