Hmmm....I'm trying to remember if I may have done that about a mile earlier on the trail when we stopped to "adjust" Fred's instrument cluster. I had pulled off the trail so a Pinzgauer (or whatever those 6-wheeled things are
) could get by. I probably didn't have to use the brakes again until around the time I noticed the problem, so I guess it's possible the damage had already been done by then, and the cylinder puked a piston when I was trying to figure out if a brake was grabbing. Makes about as much sense as anything else, I guess....
My big concern now is that the mounting surface on the housing is slightly tweaked on one corner. I don't THINK it will hurt anything, at least I hope not. If so I guess I'll have to sell a kidney and buy a D44 or 9".
I've added a few more photos to the Webshots album, and you can see the damage better.