Practice of this Pranayama demands skill on the part of the student. He who practises this Plavini can do Jalastambha and float on water for any length of time. Mr. 'S' a Yogic student can float on water for twelve hours at a stretch. He who practises this Plavini Kumbhaka can live on air and dispense with food for some days. The student actually drinks air like water slowly and sends it to the stomach. The stomach gets bloated a bit. If you tap the stomach when it is filled with air, you will get a peculiar tympanic (air) sound. Gradual practice in necessary. The help of one who is well-versed in this Pranayama is also necessary. The student can expel all the air from the stomach by gradual belching.