Plāvinī (floating breath) is among the rarest of the classical Haṭha prāṇāyāmas. The practitioner swallows air (crow drinking — kāka mudrā) to fill the stomach rather than the lungs, producing a sensation of lightness and buoyancy. In Gheraṇḍa Saṃhitā it is said that one who masters it can float on water for hours. For modern practice, work with a long, buoyant inhalation into the belly and chest, a sustained kumbhaka with udḍīyāna bandha, and a slow, silent exhale. Treat it as a deep pratyāhāra technique. Practise on an empty stomach only.