It's a bit of magic I learned accidently. Witches were I come from can take themselves out of their own bodies. We normally use it to borrow the minds of animals, like birds and rabbits.

Granny Weatherwax was teaching me more about it. She's the one who recomended the sign. [She held up the sign in her hands] She's been mistaken for dead a few times before she thought it up. [Of course Tiffany's sign has better grammer then Granny's.]