What were the extraordinary yogic practices of Sai Baba mentioned at the beginning of Chapter 7?

The introduction to Chapter 7 mentions several remarkable and seemingly supernatural practices attributed to Sai Baba, highlighting his spiritual mastery. The text specifically refers to his practice of Khanda-yoga, which is described as the ability to disjoint his own limbs. In this state, his hands, feet, and head were sometimes separated from his body and then joined back together as before. In addition to this, the chapter mentions his experiments with yogic cleansing techniques such as Dhauti, which involves cleansing the stomach, and Poti. These practices are cited as examples of how he toiled for the benefit of others and even bore the sufferings of his devotees upon his own body.