The sensation of realizing you are existing in two separate bodies, the physical body and its projected double, during an OBE. Duality is caused by the mind-split effect, and is usually only realized when perceptions are received from both bodies simultaneously. I.E., a projector is operating at a remote location from their physical body, but are still aware of some sensory input, usually sounds and tactile senses, coming from their physical body. The center of consciousness will also often flicker back and forth, between the physical and its projected double during an OBE. Also see: Mind-Split, Mind-Split Effects, Remote Eye.