We went sailing yesterday in good wind (16-17 knots) on a UCLA MAC Vanguard 15 and I experienced my first unintended capsism*. It's not the first time I have capsized a boat; you're forced to do it in Sailing I. But there, it's less clumsy and more planned.
We were tacking and I was on the port side of the boat, but I was too slow to get to the other side because my shoe got stuck underneath one of the hiking straps (you purposefully put your feet under them so that you can lean really far out of the boat without falling into the water). And then, in slow motion, the starboard side got higher and higher and I was not on it.
Not long after, I was in the water.
Not only did the boat capsize, but it turtled as well, i.e., went completely upside-mast-down.
It took two attempts for both of us to get the boat upright with us in it. The entire experience was cold, wet, and somewhat windy, and not at all the sort of thing I would want to do on purpose. But it did remind me that Alex is exactly the person I want to have around in a real emergency or other confusing circumstance. Also, we make a good team. I can sink a boat and he can re-sail it.
* I don't think "capsism" is actually a word, but thanks to Google I know that somebody once used it here.