I'm pretty sure Tesla wrote about encountering this same phenomenon where he evidentially realized this was a evidently a natural characteristic, inherent to the methods he was experimenting with in the development of a practical technology that would unlock the potential benifits of the free and limitless zero point power.  If I remember my research correctly, after discovering the cold envolope or Corona, he would start referring to aetherial energy as "cold energy".  I may be wrong about who it was that made this discovery first or some of the exact terms used, but I did read about this many years ago.  I certainly didn't make it up to be a troll.  Maybe somebody else has heard something about this before, as well.  If so, give me a reply.