At Dragon*Con, I did a dramatic reading from my book, Death from the Skies! which was a lot of fun. I read from Chapter 1, about asteroid and comet impacts, and BABloggee Brandon Alexander recorded it.
After the actual reading I talked about impacts as well as other disasters I cover in the book -- including my favorite, gamma-ray bursts. It was a lot of fun, and Brandon posted the video from it as well:
I know, I have a lot of fun wiping out the Earth. But it is fun to think about, as long as you remember the odds of any of these things happening are pretty low. Still. Yikes.