Chapter 10 mentions that Baba's movements were 'imperceptible.' What specific example is used to illustrate this, and what is the given explanation?

The primary example used in Chapter 10 to illustrate Sai Baba's imperceptible movements is related to his sleeping plank. The text describes how he slept on a narrow plank suspended from the rafters and explicitly states that 'when He climbed up or down, no one ever knew.' The chapter offers a mystical explanation for this, attributing it to his 'Great Siddhis' (powers). Specifically, it suggests he was a Master of 'Anima,' the power to become minute, allowing his movements to be as subtle and unnoticed as those of flies, insects, or ants.