...worst hand injury I ever saw was a guy who had some fishing lures upon which tiny bits of rust had begun forming on the hooks.
...he also had a wire grinder thingy
...he decided to use the bench grinder to clean the rust off the hooks.
...he got a good firm grip on the lure and held it up to the wire brush of thee bench grinder. The grinder immediately snatched the lure from his fingers and as it was turning rapidly, it continued round and round and every time it went by it stuck another hook in his had and then twisted it off. He had to have multiple hand surgeries to get it back to a semi usable state. It still don't look right.
This is a "Cringeworthy" event.
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