"We don't know what's inside it, but it's probably this" - that sounds like a challenge for a reading in experimental philosophy.,(reply>), Some genius at Oxford or Cambridge is now considering a new professional category.<br>Hypothetical Theoretical Physics Philosophy as applied to Potential Voltaic Potential Pile Apparatii  (excuse any potential spelling errors)   ;) <br>His signwriter is gonna love him!  :),(reply>), Its definitely Mr Jingles from The Green Mile inside, running on a treadmill.