Thanks all. I can't even fail at dying. I guess for anyone searching: this was an impulsive partial. I had researched and practiced, and perfected a slipknot. It was really, really painful and not over anywhere as quick as I thought it would. I just felt like I was choking and then I stood up (which took a while as I'd positioned myself at a weird angle). I guess it really does rely on getting that position absolutely correct. I thought I had but I guess not.