I think the heart beats faster to compensate for the lack of blood flow to the brain. But if you pass out quickly you won't feel your heart racing.
I did it with my scarf, I put the noose around my neck and lowered my body to the floor in a partial sitting position and then the other time I was almost lying down with my neck being held by the noose. I was starting to pass out very quickly, in under 5 seconds. I would've been gone but I stopped the attempt because I was afraid I'd get discovered too quickly.
The other time was also partial hanging with my scarf but this time I stood on a bucket, pre-tightened the noose and stepped down very quickly. I was then on my toes and the blackout was instant. It felt like I was daydreaming. I regained consciousness because I put my feet flat on the floor again.
Thank you for all these details!
As I understand, partial will be your method?
And your scarf is it large or slim? For me it seems like a scarf has to produce a diffuse pressure and in my understanding it'd not be good to compress carotids... But your experience show the opposite :)
It must be the pressure that is important.
I'd like to have it so easy too... (but more with tourniquet or night night, because it's less dangerous to practice...). At the moment even what I have with my fingers (not complete experience) I don't have at all with a rope...