So slow strangulation or no blood to the brain from constriction instead of a snapped neck (which is the real purpose of hanging...no cruel or unusual punishment, which slow strangulation would be).
Got it. Thanks for the confirmation, whether you meant to give it or not.
In 30 seconds people go unconscious.
A proper hanging, to snap the neck, takes some serious knowledge. The knot has to be applied correctly, and the drop has to be sufficient. As mentioned, everything involved has to be strong enough to hold the weight and stand up to the shock of the drop.
It is quiet difficult to do inside most houses. There isn't sufficient drop available.