Now I have been there too. I mean you are trying to explain the theory of black holes and how they work and no one has any idea what you are talking about. A problem as common as the day is long. Well, fret no longer there is a fantastic site that explains the Anatomy of a Black Hole. It uses small video and great explanations to demystify a very hard subject. Even if you don’t care about space, check it out because it is really cool. Give it a try!