If after learning about jury nullification you think it's a good idea: answer «yes» and you'll be rejected, but answer «no» with the intent to get on the jury to nullify and you've just committed perjury — technically a federal crime — which makes the optimal strategy once on a jury to zip it.
Even if you think you already know all there is to know aboutjuries and jurynullification, there is probably still something you can learn from this talk!