Nock down, but no drag out.
I too have been in a nock down. We were enjoying a 2 knot day when a wall of wind caused be a close tornado hit us. The boat was an O'day 22 shoal keel. She had her main fully deployed and a Genoa 135 on a roller furling fully deployed. My wife was on the bow holding on to the pulpit (doing a Kate Winslet) and I was behin her with a foot on each toe rail. the boat was blown over instantly. You can say we were caught off guard. No one went in the water. The wind continued very strongly for 10 minutes or so. By 15 minutes is was tapering off. She went on her starboard beam and stayed there. The sail spilled their wind when it was all the way over. If the boom wasn't close hauled, it would have been in the water. The boat never headed up wind. Infact, we tride to heave to, but couln't. With the sails down, we headed with the wind at hull speed. Man we were moving. Every time we tried to turn into the wind, the wind would hit the side of the boat and push us over again. We just coulnd't get around fast enough for comfort. We finally got the six horse power motor started and got it around and got to the lee shore where we found protection from a cliff. My wife is still scared of healing over. I had her out on my boat on a nice day. We could have been doing hull speed and healing nicly, but she was white knucled at 10deg heel. My daughter loves 30deg or better. I get nervous at 30 deg, but I know better. You can't blow an O'day 22 over no matter what keel she has with just wind alone. It takes a series of wave to capsize it and that is with a capsize screen of 2.2. Imagine what it would be like with one well below 2?Sail safley, have little fear, but great respect.Been there heeled that.