In college I worked in a sawmill and one of the jobs I frequently performed was running an industrial-sized chipper to dispose of edgings and trim pieces. “Not survivable” is an understatement. A 8”-diameter log could come down the conveyor belt around walking speed, into the throat of the chipper to the blades and not slow down, coming out the other side as cornflake-sized chips.
Years ago, I occasionally worked a system designed to turn special documents into powder. It was the size of a truck trailer and required two people to operate. One person’s sole job was to hover their hand over the big red kill button whenever anyone was feeding paper into its maw. It was SOP when first powered up to feed it 2x4s to clean the grinding plates.
When I was a teenager I got a summer job working in a paper factory. After I had worked there for several weeks, one of the older men explained how dangerous the machine was. Easily a hand could be caught in it and amputated immediately. I hadn’t thought of that. Nobody had explained it to me before then. I cringe as I think about it.