Nothing like working with rocks or stone walls, a lot of work but the results are usually worthwhile. I've done only dry stack walls with natural stone or formed concrete. Saw a partial finger blow-out on a fellow worker, he was placing a concrete block and got the fingerprint part smashed and it blew out a bit. Easy to do really when tired and trying to get through the job. We use ball carts for moving trees for the bigger rocks. Saw a guy remove a rock from a running gas powered hedgetrimmer. He lost about a quarter to a third of an inch off a finger tip.Caught my ring finger under a 90 lb rock that I was settling into place. I lifted one corner and walked it to drop in place a bit further. Unfortunately there was a bump underneath that filled the space where my finger should have had room.
First time that I've not just ripped skin, but burst it. The 2" inch drop was enough to blow the side of my finger out so the blood could escape. Holy shit, it comes with the job, but man I was running in place yelling until my mind said ice, ice, ice. I ran to the frig dripping blood through the kitchen, opened the freezer, and no ice. No freaking ice!
My karma was good though because there were two popsicles. I slammed them over the finger like a hot dog in a bun. Kept it there until the pops totally were a melting mess. That cold relief saved my ass.