Strangling myself

[Sprite]

Hanging was my first choice, but as there is no places in my house to actually do so and I'm not into looking for one outside, I was thinking... Is there a knot that once I tie it the hardest I can it won't release after I pass out? For example while laying on the bed, using 10mm rope.

 

[Worndown]

There are knots that could do the job.
The problem will be SI driving you to release it. You might need to secure your hands after you tighten it.