I've sawed a lot of firewood in my day and only had teh chain come loose when itw as not properly tensioned, the chain broke or something of thatnature. The closest I ever came to getting hurt with my saw was when I was making split rails with my 025 and soime ripping chain...I thought the tensionw as enough but I guessit had gotten loose, the chain came loose and hit me in the knee. I just gota little nick from it, but if that had been regular 35LG or 26RS chain like I normally use, I would have had a good cut on my kneecap. Other times was before I knew what I was really doing and had crappy saws and didn't maintain them as well as I should've because of ignorance. One time the liitle homelite let go of it's 63PM1 chain casue the chain broke in some exceptionally hard live oak, no injury to me or the saw, just needed a new chain,