No personal injury here, but a bit of hurt pride.
I'd just bought my 290, and was taking down a birch tree that needed to be pulled down to get it where I needed it, and I was working by myself. I got the rope around the tree and hooked to the tractor, made the face cut, then tightened the rope & set the parking brake. As I made the back cut, the tree started to go, then spun on the stump. I dropped the saw and hauled tail out of the way, and of course the tree landed on the saw.
New front handle, filter cover, and control lever, and it was back in action, but it still has a couple pieces of cracked plastic to remind me not to try borderline stuff, especially by myself. Had that one landed on me, I could very well have been there a long time.