How do they do that?

Since I had quite some traffic on my web site after this contribution in
rec.aviation.soaring (everybody was looking for that dune running video), I
have added a large number of new videos including some ridge soaring flics
to my site.

Have a look at http://gliding.hoppenrath.com/index_en.htm.

You can find even more videos on my main page (in German) at
http://gliding.hoppenrath.com/index.htm#videos.

Happy landings
Detlev