Well, transamz9 jogged my memory-bone and I do remember doing one dumb thing. I'd done it a hundred times, but it only took one fail to show me it was dumb.
I was climbing out of the bed of my truck, over the tailgate (I climbed in that way, so what's the problem?) and on the way out my right foot missed the bumper. It hit the ground hard, and my right knee bent backwards, destroying the ACL. I was left hung up with my left leg draped over the tailgate lip, and hanging on for dear life with both hands. I couldn't push myself back up high enough with my torn-up right leg to get my left leg unhooked, so I finally just had to let go and landed on my back.
Dang near passed out, but within an hour all the pain was gone and I could walk around, but the knee sure felt unstable. It would scare the bejeezus out of me when it would act like the thigh bone was going to slip down inside my calf.
That was eight years ago, and I now have somebody else's Achilles' tendon standing in for my ACL. I can tell when the weather is about to change now.
Actually, I don't think it was getting old that made me forget that. I blotted it out 'cuz it sucked!
Don't climb over tailgates!
:):)