I know! It was like a transfer area with railroad cars and tanker trucks, no signs to indicate what the facility was supposed to be! The only other time I experienced something like that was when I hiked, heading into in the wind, for 1/2 hour to see a volcanic vent and the sulphuric acid mixed with rain droplets burned off the coating from my new Oakley sunglasses! But this was just one 50 yrd run through a cloud on the ground! Less than 10 seconds of exposure!!!!