They were preparing to ship out, for the first time, a one-ton steel cylinder of CTF. The cylinder had been cooled with dry ice to make it easier to load the material into it, and the cold had apparently embrittled the steel. For as they were maneuvering the cylinder onto a dolly, it split and dumped one ton of chlorine trifluoride onto the floor. It chewed its way through twelve inches of concrete and dug a threefoot hole in the gravel underneath, filled the place with fumes which corroded everything in sight, and, in general, made one hell of a mess. Civil Defense turned out, and started to evacuate the neighborhood, and to put it mildly, there was quite a brouhaha before things quieted down. Miraculously, nobody was killed, but there was one casualty —the man who had been steadying the cylinder when it split. He was found some five hundred feet away, where he had reached Mach 2 and was still picking up speed when he was stopped by a heart attack.
John D. Clark
I G N I T I O N !: An Informal History of Liquid Rocket Propellants, page 74
[The chemicals these people created and worked with were incredible. Some compounds caused things like dirt, concrete, and test engineers to immediately catch on fire upon contact. Others would burst into flames upon contact with the ground, burn for a while, and then violently explode. The reactivity and energy content is just mind boggling.—Joe]