I actually managed to get a good squeeze in today, I felt some exploding head, some light headedness and a small amount of tingling in my face. I felt around with my fingers just now and also got tingling in my foot, along with a small amount of faded vision (and of course exploding head and pain, as well).
I just read some article where it was stated that the cause of unconsciousness in blood chokes (MMA), was often a combination between reduced blood flow to the brain and reduced blood flow from the brain. Apparently the brain can't really take in super much blood if the jugulars are constricted and will eventually stop taking in fresh blood. This will fucking hurt though, I just tried it (guess I accidentally catch the jugulars when going for the carotids somehow). My carotids are also extremely fucking close to the trachea, so I don't know if night-night is even possible for me.