I was just about to post that he was also an excellent bongo player, but that was the similarly bad ass physicist, Richard Feynman.
The BBC has just screened a series entitled Wonders of the Universe, which I would highly recommend, presented by perhaps the heir to Sagan's throne, Professor Brian Cox. He has the same sense of genuine awe about him when witnessing something remarkable, and succeeds in bringing the potentially dry subject matter to life. He invited UK comedians including Chris Morris to tours of the Large Hadron Collider facility at CERN, his day job, regularly does mini-lectures at gigs with comedians and indie rock bands, and also used to play keyboards in this band, before quitting to finish his PhD.
[youtube]http://www.youtube.com/watch?v=aj4wcuo9Mgo[/youtube]