I just read a story about a guy who killed his girlfriend and then killed himself with a bag on his head.

This got me thinkin - The Passout Game or Choking Game - could that not be used to make the process pretty much totally stress free and painless?

I was able to learn to do the thing to myself with nobody else's help. You bend over, hands on knees. Over breathe for a dozen seconds or so, simultaneously take in a breath and quickly strand straight. Instantly wrap your hands around your neck, palms on either side of your wind pipe and squeeze your neck. Passing out usually occurs in a few seconds.

I mean, let's say you get one of those thin, produce bags (for when things go wrong and you need a quick way out.)

So, put duct tape around the bottom of the bag, attach to neck, and then do the above.

Would that not make you pass out, and then slowly asphixiate while you were out and couldn't experience it? You might have to experiment with how much air is in the bag. And, since it's a produce bag, it'd be super easy to tear if you needed out?