WILD exciting stuff.
Stelarc is well known for his inquiry into the phenomenological body by suspending himself by the skin on his back.... ( gulp) on fish hooks on-off over the space of 10 years.
Often without an audience, his project was initiated not to shock, but as a genuine inquiry into the nature of our 'bodily' existence in space: how much are we pure mind/body/consciousness?
For more information:
http://www.stelarc.va.com.au//

Also check out Brian Massumi's Chapter on Stelarc "The Evolutionary Alchemy of Reason" in his book PARABLES FOR THE VIRTUAL, where he deals with our knowledge/non-knowledge of perception and sensation in the age of technology and globalisation.