How to make myself faint?

[drownll]

I tried to strangle myself with one hand, two thumbs, a cable etc... around my Adam apple but i can't faint, my head fills with blood and i get dizzy but that's it. Apparently it's because i'm only compressing the jugular veins
How exactly should i strangle myself in order to compress the carotide arteries? And what is the indication that i'm doing it right? Like is it painful or uncomfortable? How many seconds it takes before fainting?

 

[HypoxicHeaven]

It's very hard to do, ik
took me like 30 tries of adjusting the rope with partial hanging to finally compress carotid arteries, but when I was about to pass out, SI kicked in

It should feel like calm, and your vision will be fading even with your eyes open when you finally are able to compress the carotid arteries, takes like 10 seconds or less to pass out

For my attempt, I plan on huffing R134a from a plastic bag to pass out. R134a is the same stuff in air dusters.

Edit: I tried partial again, I was able to pass out even with out the R134a, but I got up for some reason.