I didn't intend it to the extent of invulnerability. More like maybe a subliminal reflex to keep me from getting terribly injured by what the body considers normal encounters.
Then again, if that's too metaphysical an explanation, I'm not sure what to say...
“…Judge not what a man has done, but judge what he could have done if he was a different bloke altogether. For art thou a leper? And a leper can changeth his spots…” --Rudy Wade, Misfits (Series 4, Episode 8)