As soon as I saw this
http://www.npr.org/blogs/thetwo-way/2012/05/17/152914905/hot-pants-indeed-rocks-in-pocket-set-womans-shorts-on-fire
I recalled our discussion a month or so ago about the lubricant {ngIS} used in hand grenades. Not so far-fetched, after all, eh?
-- ter'eS