Something from nothing?
Or maybe a vacuum is not “nothing?” Space is actually made of “ether” after all.
E.W. Davis and H. E. Puthoff, “On extracting energy from the quantum vacuum,” in M. G. Millis and E. W. Davis (eds.) Frontiers of Propulsion Science (American Institute of Aeronautics and Astronautics, Inc., Reston, VA, 2009) pp. 569-603.
http://www.aiaa.org/content.cfm?pageid=360&id=1743
Note the author, Hal Puthoff. He has done some VERY interesting and unorthodox work in his career.