Close your nose tightly. The countdown starts.
You may feel difficult, but do not worry, do not loosen your hands.
It becomes impossible to hold hands as you cannot breathe, but do not loosen the grip of your hands.
You may feel like opening the hands, but do not release the hand, you may feel exhausted, shake the body as it feels, but do not let loose the hands till the countdown stops.
After countdown stops you are totally and completely relaxed, the stress has been fully released