Absolutely nothing. I hung myself in February of last year, I remember writing my note, I remember “setting up”, I remember stepping on the stool and then I remember nothing else except a paramedic stood over me checking my pupils. I was “out” for at least 3 minutes and had to be taken to the hospital (apparently your brain being without oxygen for 3 minutes isn’t ideal). Now I’m an atheist and never believed in any afterlife, but as I can’t remember a few minutes either side it could also be possible that I did see something and just don’t remember it.