Didnât what to steal the chain brake thread, so Iâll start a new thread here. I have a rather embarrassing chainsaw question that I should know the answer to, but I donât. My question is, what exactly is âkick backâ and what causes it. Iâm no novice to cutting wood. In my life time, Iâve cut hundreds of cords of firewood. None of my early chainsaws have had chain brakes. My last saw, which I bought 3 years ago, is the first saw that has ever had a chain brake. In fact, the first time is locked up, I had no idea what the problem wasâ¦.I thought the engine had seized! At any rate, I do not believe that I have ever experienced âkick back.â What is it? Why have I never experienced it?