Wow I missed this one a few months ago, glad to see you're alright. A few times I've thought "holy crap why did i do this?" but no major accidents yet. I've ripped my thumb backwards(sounded like a zip-tie), de-skinned my shins, and rode a tree I cut a few times. My Dad had a close call about 2 years ago I'll share.
He was pulling a 40' dead maple on the ground with an old D4(no ROPS, or cage). He put a 25' chain about 5-6 feet up from the roots and attached the other end to the blade. Pulling a downed tree on flat ground sounds safe right???? Well as he was backing toward a cliff on the mesa he was looking behind to see where he was going, avoid cliffs dogs etc. When he turned back around the tree was dead vertical and coming his way fast. The roots had caught on something and the tree came over back on my dad in about 3 seconds. He ended up with a tree on top of the dozer. He was hit in the head, arm and leg. A 6" limb drove it self down between the firewall and the clutch and had one of his arms pinned down and he couldn't get free. So he can't take the dozer out of gear, can't disengage the clutch and he's heading toward a cliff. He ended up finding a small broken limb that he used to pry the big limb off his leg and other arm then he was able to move it just enough to disengage the clutch. He ended up with major bruises and a huge hematoma. Now we always have a second person on the ground when using the heavy iron, even when pulling a downed tree on flat ground.
Thanks for sharing Brad, it takes a lot to share mistakes/accidents but if it helps one person it's worth it.