Regaining the vision in partial hanging

[golfmavenice]

Hello everyone.
Today I tied my ligature to bunk bed andput my head in the noose and lean forward, my vision blurred after 10 seconds, but I gained my vision again in 15 seconds.

Why did that happen? It was because there wasn't enough pressure on the rope? I can also try hanging from my closet but it makes me breath so heavily when I try it.


I always position the rope above my Adam's Apple.

Any idea is highly appreciated.

Thanks
golfmavenice