I've met him twice. The first time was when he was taking part in a charity event a few towns over from me a few years ago. We had a very nice 5 minute conversation about his airlander thing he was involved in at the time, and I spoke about the upcoming gigs I was going and said I was seeing one of his son's bands in a few weeks, and how I was really impressed with them when I last saw them. He was very flattered and signed my Empire of the Clouds record and had his picture taken with me. Incidentally I met him again at his son's gig a few weeks later, albeit very briefly! He was very polite but obviously wanting to speak to his family/friends, which is fair enough as it was his son's gig and he probably wasn't expecting to be approached.