But as in Worndown's picture, I'm already sat down (not exactly but you get the point), so the legs aren't supporting me (as opposed to say bending the knee while standing). Maybe I'm visualizing this incorrectly, but I feel like with the right (or in our case, wrong) kind of wriggling/thrashing, the body could potentially slide itself back up. I need to do more research on this method, have been too confident with SN.
Hmm. I might be using the wrong terminology here but the point is it's still uncontrolled jerky body movements.
Being my first attempt, I basically tried a little too hard. Had a pill cocktail of muscle relaxants and zolpidem before the attempt, trying to keep SI down. Also had a large garbage bag over the head (running under the slipknot), so if the attempt fails I still die of suffocation. I managed to get the initial woozy feeling, but then maybe the knot moved or something, because instead of getting unconscious I just got horrible, vivid hallucinations and then blacked out. Woke up puking my guts out and that was it. Learnt the lesson that for partial you need to be in control of your senses.