[Aaron757]

ps, from the same text there are also some nice metaphors for OBE:

The passage goes:

When the meditator's mind is thus concentrated - purified, cleansed, clear, devoid of defilements, supple, workable, settled, and completely still - he inclines his mind, he directs his mind, towards the creation of the "mind-made body" (mano-maya kaya). Out of this body he creates another body: material, mind-made, possessed of all limbs and not lacking any faculty.

As if, O king, a man were to draw out a reed from its sheath. It would occur to him: "This is the sheath and this is the reed. The sheath is one thing and the reed is another, and from the sheath the reed has been drawn out."

It is as if, O king, a man were to draw out a sword from its sheath. It would occur to him: "This is the sword and this is the sheath. The sword is one thing and the sheath is another, and from the sheath the sword has been drawn out."

It is as if, O king, a man were to remove a snake from its slough. It would occur to him: "This is the snake and this is the slough. The snake is one thing and the slough is another, and from the slough the snake has been pulled out."

Thus it is, O king, that when a meditator's mind is thus concentrated - purified, cleansed, etc as 1st para.

Interestingly this is the first power that results after mastery of the 4th jhana (4th level of appana samadhi "absorption concentration" or "trance") and appears to be viewed as ability that comes automatically once your meditation reaches that level. It isn't totally clear, but it seems like the subsequent powers are also based on this one (flying, passing through walls, walking on water etc). "Material" here (rupi) means subtle matter.