It wasn't recent, probably been about 14 years ago.  I was somewhere around the age of 18, still had some experience I started using a saw at a fairly young age. Anyway my step grandparents had a huge white oak they needed taken down. It was somewhere around 42" in diameter at the stump. My Dad said I was the man for the job, cheap labor lol. I topped the whole tree and had about a 35' tall stump with some big limbs (20") left.  The tree was standing right beside a work shop, it had a super heavy back lean and a house directly behind it. We tied a long rope to one of the top branches and hooked it to a tractor.  I made my notch and started around the back, drove a few wedges and everything was going good.  I was getting close so I gave the signal to the guy on the tractor, when I did he got too excited and dropped the hammer (hit the gas).  I looked up just as the rope snapped, the tree came back to me so I pulled the saw and ran.  Apparently the saw was still turning at a high rate of speed and on the first stride away from the tree I hit my leg.  It took me a second to figure out what went wrong, and man I was glad those chaps had done their job. A while later I had the Kevlar out of the chain/sprocket and I was back in the wood.  I was so appreciative that the guy at the hardware kind of made me buy them, that I took them back to the store to put them on display so others could see how important they are.  I left them there till the store closed down and I went and got them back.  They now hang on the garage wall to remind myself when I'm feeling lazy and don't want to take a pair, that I probably should.