Military was my first thought, too. We had a lot of black humor in the 82d Airborne. We knew full well that in any kind of conventional warfare, we were nothing but an under-armed infantry without armor or artillery support, hung out to dry under a small nylon parachute.

But it happens across the service. The very first instructor I had in demolitions used to stroll back and forth across the TOP of the protective berm before a shot....singing "The worms crawl in, the worms crawl out..!"