I've posted this before but it still makes me chuckle.
I was boarding a flight to Chicago and an elderly American couple handed me there boarding cards, as I gave them the stubs back I said feel free to help yourselves to water from the rack. (We give bottles out as you board). The old man turned to his wife and said "WHAT DID SHE SAY?"
Her: "WE'RE FLYING OVER IRAQ DEAR!"
Laugh? The whole gate area collapsed.
Bless.