The Satcharitra mentions Baba's movements were 'imperceptible.' What exactly does Chapter 10 say about this and his related Siddhis (divine powers)?

Chapter 10 illustrates Sai Baba's imperceptible nature primarily through the mystery of his sleeping plank. He would rest on a narrow plank suspended from the ceiling, yet no one ever witnessed how he got up there or came down. The text directly attributes this impossibility to his "Great Siddhis (powers)," suggesting the plank itself was just a nominal support. To further explain this ability, the chapter references 'Anima,' the yogic power to become minute. It speculates that Baba’s movements could have been as subtle as those of "flies, insects, or ants," making them completely undetectable to ordinary human perception and demonstrating his mastery over the physical realm.