(ex Army medic) 20 years ago I had to do first aid on a mechanic who had cut his foot with a petrol powered pressure washer.
He was cleaning he underside of a truck and had flip flops on.
.... Horrible. I looked like an axe wound and it took weeks to heal
Off topic but even worse was a Namibian guy who had been tortured with an industrial sand blaster. When I got to him most of his muscles were striped off his feet and legs.
He spent months in a UN hospital and lost both of his legs from the knees down.