@RogerP: Thanks for posting that, excellent.
@Grayorm, et al:
Well I hunted high and low at home last night and couldn't find my VHS/DVD, sorry.
But I did find a couple of still pix (not taken by me). They're small, but along with the video I hope they give some idea of what I was talking about, see below:
Just to give you a little more info. Dittingen is a small village in Switzerland, near Basel (NW of the country) and about half an hour drive from me. Hidden at the top of a big wooded hill, where you'd never expect to see any sort of airfield, is a small grass strip which is the home of the local gliding club ("SG Dittingen").
Every 2nd year they hold an airshow with all sorts of interesting aeronautical stuff to see, and it was at the 2005 show that the powered hang glider/geese combination appeared.
I have also searched a lot on Youtube (and on various other video sites) for a video clip of the geese, but no luck, so it looks like the clip posted by RogerP is the only one around.
Anyway if anyone is generally interested, a quick search for "Flugtag Dittingen" on Youtube will show up lots of videos of the shows held in 2007, 2009, and 2011, though as said, I can find nothing on the geese in 2005.
Krgds
AES