Some really nice shots there Marcel, thanks. Do you happen to know if the aerobatic glider was flown by a woman pilot?
If so, it's possible that it's the same charming lady I met a couple of times when I used to manage the Fire Crews and marshallers for the air show at my local club. She used to put on a fantastic show, synchronised to some rather nice music. Her finale was to land off a loop, very skilful and dramatic.