What personal story from Sai Baba's life is previewed in Chapter 32, and what is its stated purpose?

Chapter 32 builds anticipation for a very special narrative told by Sai Baba himself. The text describes it as a 'sweet incident' and a 'supreme wonder' from Baba's own mouth. This story details an unexpected 'Guru-darshan' that occurred when Baba was in the forest, a wondrous deed performed by his Guru. The stated purpose of sharing this story is profound; as Chapter 32 explains, the words that Sai himself spoke are extremely beneficial, granting devotion, faith, and liberation to those who listen with full concentration. The narrative is presented as a powerful tool that can destroy sins and afflictions for the listeners.