This document discusses several challenging yoga poses that require advanced skills and should only be practiced under supervision. It describes poses like Eka Hasta Vrksasana where the body is balanced upside down on one hand, Sirsa Padasana which is an extreme backbend that provides flexibility and strength, and Pungu Mayurasana where balance is tested on one arm like a peacock. More poses discussed include Taraksvasana which improves balance done on the hands, and Yoganidrasana where the body is tied in a knot providing calmness.