I have heard the chopper but only once and that was after you mentioned it, it doesn't come through super loud on the podcast though. A while back I wrote a post after I stumbled onto a video about the avrocar. The avrocar is a flying (or hovering) saucer that the U.S. manufactured in the late 50's. I can't even begin to imagine what technologies we've mastered since then. Surely with the wasteful spending combined with 60 odd years to innovate (or reverse engineer) they must have created some pretty cool things by now.