This ability was actually made to prevent near-death situations, but now, with the proper training, it can be used in more ways than one. When you separate, your body will be in atomized pieces, your spirit will travel as a ball of light, and your mind will travel in brain waves. Eventually, you'll have to come back together, so before you split up, think of a location. Then, all your pieces will return at that spot. You can do this to anyone else as well.