Is it a bird, is it a glider?

Found this advertised in our local paper, I think it just creeps in under general aviation, looks like fun if you like being scared!

http://www.serfaus.co.uk/sommer/familienparadies/flieger/

Second thoughts, having seen the video, I’ll pass!

http://www.youtube.com/watch?v=Yj6aWQU1j5Q