This is a movement that is not seen very often and requires a lot of muscle control. I have only seen it used twice, but it was very gracefully done both times and worked very well with each of the choreographies. Lying on your back with your feet crossed, start by lifting your chest off the floor squeezing the shoulderblades slightly, allow the head to stay on the floor, your body should be lifted so that you are resting on the tops of the shoulders and the back of the neck. When you lift your chest flex whichever foot is on the bottom, the foot on top will always remain quiet. This is where it can get tricky; roll down your spine lifting your whole body off the floor for the smallest millisecond. Make sure that you roll the small of your back down or the movement will not look fluid. When your entire body is in the air your weight will be on the tops of your shoulders and the heel of whichever foot you have on the bottom. Also, as you roll down your spine your legs will be picking up the slack the very last thing you do is to straighten them out and begin again. I recommend practicing this a lot, to get it right. If it's done incorrectly it will just look ridiculous.
Stomach Rolls
Doing the stomach rolls while lying on your back can be very dramatic but is not seen very often. It feels pretty much the same as doing it standing up. In either direction simply contract the diaphragm and the lower abdominal's and then release them in alternation i.e. in, in, out, out, or out, out, in, in. This is not done for long periods of time.
Stomach Flutters
Doing the stomach flutters while lying on your back can be very dramatic but is not seen very often. It feels pretty much the same as doing it standing up. Simply contract the diaphragm and then release it, the lower stomach will come along for the ride. This is not done for long periods of time.
This is a movement that is not seen very often and 
