Yeah, relating to the injury JPS mentioned about putting a short log into the feed rolls...
Sometimes the butt-end of a short log will whip upwards violently, it depends how it gets grabbed by the feedroll lugs.
I know this, seen it a hundred times, instruct new groundies to be aware of it, stand clear, feed from the side.
But, late in the day, tired from a big climb, helping clean-up, I broke my own rules, jammed in a 4 inch diameter, 4 foot long stub in from directly behind the infeed as I dealt with the last of the chippable stuff.
Butt-end whipped up just infront of my face >BAM!< against the top of the infeed chute, then in.
Butt-end took my visor up. That's about one-and-one-half inches to spare, max, between me going home smiling and emergency dental surgury.
Two steps to either side is all I needed to avoid this close call.
There are so many hazards in this line of work, and so many "best practices" we can use to stay clear of them. Two seconds working off of that clear line of best practice is all it takes to expose yourself unnecessarily to hazards.
Let's play it safe.
RedlineIt