True story
I once had an interview for a job where the two technical members of the panel had already seen their preferred candidate, and were now just going through the motions.
Right at the end the third member, a senior manager (naturally), asked his one and only question.
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Interviewer: "What would you do if I gave you an elephant right now?"
Me: "I would be very concerned."
Interviewer: "Concerned? Concerned about what?"
Me: "Well concerned that I was being interviewed by somebody who spontaneously gives elephants to strangers. Is it something you feel compelled to do?"
Interviewer: "It was a rhetorical question."
Me: "So I don't get the elephant then?"
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The other two members of the panel collapsed in hysterics at this point and he stormed out of the room. For some reason I wasn't offered the job.