Can you explain the event mentioned in Chapter 43 where Sai Baba appeared to have died but then returned?

Chapter 43 recounts a startling incident where Sai Baba's followers believed he had passed away, only for him to return. The text explains that Baba once raised his life breath to the crown of his head, or Brahmarandhra, for three consecutive days. During this time, some people concluded that this was not a state of Samadhi but death itself. As they began preparations for the final rites, Baba suddenly returned to his body, which, as Chapter 43 notes, left the people completely startled in their hearts.