Why do I experience a second, floating body when body scanning? When I did the 10 day Vipassana meditation retreat, sometimes I would find that when I was body scanning, I would suddenly realize I was scanning a second, floating body maybe a foot in front and above from my actual body.  I could feel my sensations in the second body, but it was very disconcerting because it FELT like me, but was a projection.  I felt distrustful of my own experience.  If I recognized it, I could get my attention to return to my actual body and the projection would  go away. 
What was that and why did it happen?  Should I have just kept on doing what I was doing and observed, or (sort of) forcibly returned my attention to my actual body, as I did?
That's really interesting.  I would say that because Goenka and the ATs (and the Buddha as well) say to scan the actual bodily sensations, the reality, it was the right thing to do to return to the body itself.  Did you talk to one of the ATs about this, by the way?