You must assess the forces in the wood you are cutting with every stroke of your chainsaw. If you don't, you will wreck logs and get your saw jammed up frequently. Yanking a saw loose out of a pinch can also break your crankshaft. One of the less common forces you will see is the side-bind, and they can be deadly. Here are a couple of videos of side-bind accidents, and one of my own that we did a few years ago.
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