Not wanting to go down alone, however, I was still holding onto the mainsheet, trimming in hard about 15 feet away. I'd felt like this before, but that was getting up on water skis. Good then, not good now. Needless to say the boat capsized, my son went flying, and we now had the task of righting the boat, which we did with some help from the Sandpoint Sailing chase boat. I'm sure he meant it in a good way, but it was definately pilot error.
Confidence is a good thing.
Overconfidence is not. Would we have been out there in that wind in that boat without knowing we had help if we needed it. We were in a relatively safe situation, so the lessons learned were only at the price of bruised egos and a couple gallons of lake water. Match your confidence realistically with your abilities and the circumstances. No matter if your boat is 15' or 150', act on realistic confidence based on ability and knowledge.