Seeing one's own double.
aka autoscopic hallucinations.
Sometimes associated with Out-of-body experiences. References:
The experience of seeing one's own double has been called 'Autoscopy' or 'autoscopic hallucinations.' Here again the double is not the 'real' or conscious person. It is seen as another self, but the original self still appears the most real. In the OBE it is the 'other' which seems most alive.
Although the OBE is rarely distinguished from autoscopy in the psychiatric literature, other distinctions are made instead. The main distinction is that OBE involves feeling of being outside the body while autoscopy usually consist of seeing a double. Some people see the whole of their body as a double; some see only parts, perhaps only the face. There is an internal form in which the subject can see his internal organs; and a cenesthetic form in which he does not see, but only feels the presence of his double. There is even a negative form in which the subject cannot see himself even when he tries to look into a mirror.