I'm the RC chairman and after the fleets get going I cruise the course watching for mishaps and taking pictures. I got a sequence of Garry going into a death roll and don't know HOW the boom didn't come across, but the pics speak for themselves. "Giant" Vicki Tuthill (95 lbs) can be seen standing on the cabin top with her back to the boom........................................ I have since warned her of EVER doing that again in winds that are strong enough to keep the boom out without help. It would NOT have been a good day for her if that boom had come across. I dare say that she would have been thrown into the lake at least and possibly severely injured!!!!
These shots are in sequence and I'm upwind of them, so you can see how far by the lee they got!!!!!!!!!
It's supremely ironic that the vang being too loose is what lead to the rolling to begin with and at the same time is probably WHY the boom stayed over: look at how loose the leech is!
Also, although the wind strength in the first race wasn't really too much for the boat with the Genoa, ESPECIALLY with 6 people, most of time only four of those were hiking and I'm still working on Garry about flattening the sails out more to upshift................................................................ 
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