It is a variation of vrschikasana /scorpion pose on swiss ball. Swiss ball is very good for improving your spine strength and flaxiblity. . How to do? 1. Drop your core on swiss ball. 2. Slowly lift your self up. 3. Fold your leg and Try to put it on your head. 4. Hold there for few seconds. Who can not do? 1. Pregnant lady should avoid to do this aasan. 2. During Menstruation period don't do it.