“Whoa, that’s not supposed to happen.”

Thus spoke Josh Fox, master of the understatement, after he witnessed a man, whose house neighbors a natural gas well, light his kitchen tap water on fire. And by “fire” I don’t mean a delicate tongue of flame like on a candlestick: it’s an honest-to-goodness fireball that comes blazing out of that tap. And it happens not once but multiple times in different homes across the country in Fox’s recently-released documentary on hydraulic fracturing called Gasland.