Yes, I work with concrete
A friend on my floor hockey team was talking with my wife about their respective crappy job situations. He'd been temporarily laid-off for a week and was really hoping to get into a government job for which he had been turned down once already. My wife is just starting a 3 month contract job, but long term prospects are weak.
I'm not paying attention to the conversation too much, but my friend turns to me and says, "What about your job? Is it concrete?"
"Yes," I say, "I work with concrete. Also structural steel a lot, but mainly concrete."
"Um, what I meant was 'In this current poor economic climate, is your job stable?'"
"Oh. Ummm. Yes, very stable and busy, thank you."