I have had a couple "close" calls with no PPE, both of which invloved instances out of predictability.
One I recall was my brother cutting a tree from across the road, and it decided to split, and twist under unseen stress.
He the tree take the saw with it as it pinched, and stepped back to get out of the way as fast as I have ever seen him move... somewhere along the way as the tree twisted around the rear handle got broken & the throttle mashed wide open, right by his face.
This was less all in less than a 1/4 second, and if I had noticed it twisting a tiny bit slower He would have needed plastic surgery.
For the guys who say "safe saw handling"; sure.
That's great.
It works on smooth dry ground where you have plenty of time to move things, plant every step perfectly, & get your load of firewood in.
However; we have hills, snow, mud, rain, leaves and sticks that easily cause a mishap.
I got paid by the stump for awhile, and there have been many times I am working on a slope too steep to climb, or hold position on without using my hands, feet, and knees all at once.
Often cutting with a single hand (useing the other not to slip downhill) on the 90cc saw once it was going where I wanted.
I am not often in a hurry, but It doesn't pay well to waste time.
yes, my finger is only on the trigger while cutting.
yes, I am as careful as I can be.
yes, PPE.
I still don't always wear it, but I am the first to admit that is a stupid thing to do.