This has got to be tried

From BoingBoing:

"The participants wore virtual reality goggles connected to video cameras that filmed the participants’ backs. Thus each participant saw his or her own body from the back ... To complete the illusion, the scientists used two plastic rods to stroke synchronously, for 1 or 2 minutes at a time, the participant’s back and the back of the virtual body. Next, the participants were asked to complete a questionnaire to evaluate their subjective perception of the illusion. Amazingly, they reported feeling as if they were being behind their physical bodies and looking at them from this location. The illusion failed when the stroking was asynchronous."