There is a video of the N17's pitchpole (click on link below and skip to 3:40):
http://nos.nl/video/519013-zeilmaker-vink-snelste-rond-texel.html

It was caused by double trapping on a tight reach smile

Because of the race being held on Sunday instead of the usual Saturday there had been a big reshuffle of crews, the Nacra F16 all-girl crew had not sailed together and was very light, 19th place was a good results nonetheless.