Though it wasn't too windy that very day (acc. to Nop), it was windy enough for him to demonstrate the forces at stake, when he was able to jump a meter and a half up in the air, by "raising" himself with both hands, while allowing the rest of the body to go limp (or something, I didn't investigate closer). Impressive, to say the least. I'm not sure of the application, but, as long as it makes someone happy. . . 
    Apart from buggies, and his life as a professional kite designer and manufacturer --as with so many other leisure activities, kite flying has become big enough sport, to support a whole industry; shops, dealer and distributor networks, own magazines and whatnot-- and other sideline interests (he has co-authored a book on kites and aerial photography Fotograferende Vliegers), Nop also has undertaken a 2-year long journey by recumbent in the USA, Korea and Japan. On homebuilt recumbents, of course.

    I first heard about that Nop and Michèle's grand recumbent tour --possibly the longest such international of all recumbent tours to date-- on the Internet, and from no less a technomad, than Steve Roberts himself. Apparently, when they met, Nop mentioned to Steve that, as they carried and flew kites whenever they could, they also managed to sell a few pictures to onlookers, farmers interested in seeing their homesteads from the air etc. This led Steve to generalize, that one could easily support oneself on a world grand tour by selling such services.
    This is is not the place to dispute that in depth, but I'd be wary of trying to whisper "aerial" and "kite" and "photography" in the same breath in any place, where the first, and, especially , the second, smack of espionage and evil spirits.