How would you show your knowledge of social media in a job interview?

Question From User - Answers in Comments.
I have a job interview this week at an ad agency and one thing they asked was that I demonstrate my knowledge of social media and online media. I have a lot of experience online through twitter, facebook, blogging, etc. But I need to show that in person, and most likely without a computer. I have a few ideas that I've started, but want to see if anyone has any creative suggestions or advice?

From Social Media Monitoring
I would suggest mentioning that you have social media experience and simply put know the sheer power of getting a company's message out before Joe Public.Why limit your product or service to your local area? If at all possible - offer it to the world and social media is exactly the way to do it. You might suggest a facebook page or twitter that you of course could oversee. I know people that have had actually had positions created for them when their employers find out about their social media skills.