Eustace needs to get a trim.
That planer has a lot of moving parts -- rollers and gears and chains. If he gets his hair or beard caught in any of that, he's in big, painful trouble.
Car mechanics who are smart know better than to have long hair, long beards, necklaces, bracelets, rings and the like when working.
Edit: bread == > beard, lol.
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You have meddled with the primal forces of nature, and YOU ... WILL ... ATONE!