Your post were the exact words that came to my mind too. Horrible indeed. My brother had his arm severed in a rock quarry conveyor belt which caught his shirt cuff in a pulley. His co-workers saved his life and he nearly bled to death.
He got lucky.
That is why there are Rules around machines.
NO JEWLERY, RINGS, WATCHES, NECKLACES, ETC.
NO LONG SLEEVE SHIRTS
NO JACKETS
NO NECK TIES
NO LONG HAIR