Not that anybody probably knows the answer to this, but aren't these guys tethered to jack lines? <img src="http://www.catsailor.com/forums/images/graemlins/shocked.gif" alt="" />
he might have been, I've heard stories of lines/clamps/cleats being snaped if the ware made out of sugar.
Maybe he hit something as well being washed off, quite some people are being smashed againgst stuff on the boat in high seas [daggerboards-up?]
It's terrible....