It's worth repeating......a spinning shaft looks so harmless, but it's one of the most dangerous things you encounter when "tractoring". In my youth I saw so many farmers with missing limbs and worse come to the parts counter. Most were taken apart by belts, pulleys, and PTO shaft encounters.....all though the snapping rolls on mounted corn pickers got it's share of folks too.
I see guys using a shovel around a Post Hole Digger or "helping" to push the bit into the ground by applying pressure to the PH digger. Getting clothing caught in the spinning shaft can wrap you up and tear you apart in the blink of an eye.....especially with the torque of a diesel engine.
(I feel like the safety police again - but most of our guys really don't have much 'chinery background.)