They gave me NOTHING to go on so I picked an offbeat American holiday. After I finished with a big smile on my face, the stern interviewer said something like: "Go ahead and assume none of your students understood a word you just said. And besides that, a part of that holiday is not founded in science. Japanese students want all your beliefs backed by science. How would you respond to a young student asking why you believe in something unscientific?" Without breaking my stride, I answered that some holidays are just for fun and are silly and that that's okay. I think he was just trying to shake me up a bit. Even if my response wasn't the best, I still answered with a smile.