float your body on water where no movements should be made intentionally,
now imagine you are being held up by my hands, and my hands they look just like your feet,
move them one by one to your ankles so that your head would sink into the water with a tilting angle of 30 degrees ,hold your body, yes hold it, but more than 30 degrees bite me, less than 30 degrees bite you. careful not to catch any fire.
