Hatha yoga "voidness" ideas found respectively in Hinduism and Buddhism. Some traditions such as the Kaula tantric sect of Hinduism and Sahajiya tantric sect of Buddhism pursued more esoteric goals such as alchemy (Nagarjuna, Carpita), magic, "kalavancana" (cheating death) and "parakayapravesa" (entering another's body). James Mallinson, however, disagrees and suggests that such fringe practices are far removed from the mainstream Yoga's goal as meditation-driven means to liberation in Indian religions. The majority of historic Hatha yoga texts do not give any importance to "siddhis". The mainstream practice considered the pursuit of magical powers as a distraction or hindrance to Hatha yoga's ultimate
Ashtanga vinyasa yoga and never taught by Sharath. However most of his teachers who claim to have been taught by him will teach the above methods, exercises, & postures, even though none of what they teach is part of the Ashtanga method of instruction under Sharath. Pattabhi Jois also did not require students to independently drop back and come up from back bending before progressing to the 2nd series. Sharath changed the requirements, and has now made this mandatory. However, it is important to note that Pattabhi Jois was the founder of the system, and taught each of his original students differently, instructing