Chapter 32 mentions a story Baba told about himself. What was it about?

According to the text of Chapter 32, Sai Baba narrated a personal and extremely beneficial story from his past. The incident took place when he was in a forest and had an unexpected darshan of his own Guru. The chapter describes the Guru's deed as wondrous and presents the story as a supreme wonder capable of granting devotion, faith, and liberation to those who hear it. The text encourages listeners to pay full concentration to this sweet incident, which Baba spoke from his own mouth, to understand the profound nature of the Guru's grace.