A turn of phrase...

"Mixing thermite with water can be counterintuitively dangerous, causing a phreatomagmatic fragmentation explosion"

Come on, tell me the mad scientist in you didn't smile when you read that.

Context? Thermite casting, lost-wax, sandbox stuff. Wooshy without the boom, blacksmithy without the hammers. Like this: http://www.theodoregray.com/PeriodicTable/Samples/026.17/index.video.s12.html