Everything is possible, it could have happened, but I do not believe it did. We cannot always believe what is said in books. Nor is there a necessary connection between such phenomena and sainthood. Some “mediums”, as they are called, have an unusual capacity. They are put in a chair, tied to it, guarded by people, and the room is locked securely from outside. Then darkness is created in the room. After some time—longer or shorter according to the medium's power—the knots are found untied, the chair is seen empty: the occupant has disappeared. Then, in an adjoining room, the person is found lying down in a deep trance. Through closed doors and thick walls the medium has passed. It is by a power of deconcentration and reconcentration of the physical substance.
Phenomena like these have taken place under the strictest scientific control. So they do genuinely occur in rare instances, but they are no sign of sanctity. There is nothing spiritual about them. What is at work is purely a capacity of the vital being. And often the mediums are people of very low character, with not a trace of anything saintly.
But to come back to the point. In connection with great or holy men all sorts of stories get started. When Sri Aurobindo had not left his body, there was circulated a story that he used to go out of the roof of his room—yes, physically—and move about in all kinds of places. It is even written down in a book. He told me about it himself.
Don't other books tell other stories?
There you are!