Consider water, and its pervasive influence in our lives. For the most part it is a benign and even essential component of our day-to-day routines. It is an important element of one's bath. Goldfish require it. But the possibility of a deadly conflagration lies hidden in every molecule, in the form of the element Hydrogen, which makes up fully two-thirds of even the daintiest droplet. One need not describe the dreadful events of 8 May, 1937, at Lakehurst, New Jersey. Perhaps by substituting Helium, water could could be made safe. I leave it to Science to work out the details.