Here's a sample of what passes for humor on a FOB:
A soldier is working at the computer with iPod earphones in place, and volume cranked way up. Announcement comes over the FOB's loudspeakers (and they are indeed LOUDspeakers) warning of a controlled detonation in 5 minutes. Soldier with iPod remains oblivious. Five minutes later, a huge blast rattles our building, knocks stuff off shelves. Soldier with iPod gets excited, heads for bunker, yells, "Shit, what was that?!" Other soldier turns and says calmly, "What was what?"