Besides the story of Sai Baba's final departure, what other significant past event is mentioned in Chapter 43?

Chapter 43 recalls a remarkable past event to illustrate Sai Baba's profound spiritual control. The text describes an incident where Baba raised his life breath to the crown of his head, a state known as Brahmarandhra, for a full three days. As mentioned in this chapter, his devotees, believing it was not a state of Samadhi but death itself, began preparations for his final rites. However, to their great astonishment, Baba suddenly returned to his body, startling everyone. This story, which the chapter promises to narrate in detail, highlights the incomprehensible nature of a saint's powers.