Can a car fix itself? TELL YOUR STORY!

Not a Mopar and it didn't happen to me but a co-worker had an old Volvo daily commuter car that had a lot of miles and developed a rod knock. He knew it was going to blow someday but it wasn't worth anything so he kept driving it. Sure enough, one day coming to work the oil gauge dropped and it was knocking BAD. He figured he would get off at the next freeway exit but before he could, he heard a loud BANG. Funny thing was, the knock went away and the oil pressure came back up again. He figured, what the heck, and drove it all the way to work. We looked it over and tried to figure out what happened. It was only running on 3 cylinders so we guessed something bad happened to that one cylinder. We pulled the plug but it looked ok.....hmmm. Checked compression and there was zero....pulled valve cover and everything was there and working so it didn't drop a valve. At that point he said "screw it! put it back together and I'll drive it 'till it blows!" Well, a year later (of daily commute!) he got a new car so we finally pulled the engine apart just for our own curiousity and found that the one cylinder that had the rod knock had spun a bearing which welded itself to the crank journal (and sealed the oil hole which brought the oil pressure back up. In the process of spinning the bearing, the rod had broken about !/2" above the big end and was just acting like a hose clamp on that rod bearing. The rest of the rod and piston just got shoved up into the cylinder where it was out of the way and sealed the combustion chamber so it didn't have a vacuum leak. I guess it doesn't really qualify as "repairing itself" but it kept going when it should have died.