...the first came to me in a wave of pure, white light as I attempted to claw my way out of a section of trail that drops into a small creek, soaks in the current for about two yards , then hooks severely to the left and rises very steeply (it's off camber and a bit rutted, too) out: a low clank rang from my front axle, and the formerly freespinning left front wheel slowed and I felt the Monty crawl forward. Coooool. I have an LSD! I'd been wondering about that. I got out of this crap after about 15 minutes of self spotting (I was alone. Wheeling w/ others is too sensible. Why do it?) and airing down- a challenge, thanks to the muddy, vertical edge preventing easy access to my passenger side rubber.
The other lesson was a little more subtle- it involved learning to trust my vehicle and experience when I weightlessly rock from side to side, two wheels are airborne and my nose is pointed at the sky. I'm glad I got out - If I'd bothered to look, I'm sure my knuckles would have been a little paler than usual. I'll launch some pics when my new lense gets here in a couple of days.