Kind of a funny story from one of my passengers when flying around the world:
He was a no kidding SEAL traveling commercial air in civilian clothes, and ended up sitting next to another serviceman. Since they boarded early, the guy asks “what branch?” “Navy” says the SEAL… “oh yeah? What do you do?” (Wanting to end this conversation, and the movie “Under Siege” being in his recent memory) says “just a cook.”
Well, turns out the guy sitting next to him was a cook, and started going on and on about being a cook in the Navy.
Finally, the guy catches on and says “you’re not a cook are you?” “Nope”
He got caught posing as a cook.
