FYI: http://www.sciencealert.com/huge-and-mysterious-electric-field-found-in-ice- cold-laughing-gas
"It was supposed to be a routine experiment, but the team soon realised something was amiss. A potential of around 14.5 volts appeared spontaneously on the film, which in turn produced an enormous electrical field of more than 100 million volts per metre. Based on widely accepted notions in physics, there should have been no electric current whatsoever." Publication reference, PDF available for free: http://pubs.rsc.org/en/content/articlelanding/2014/cp/c4cp03659j#!divAbstrac t -Mark
