Man, my uncle was a dairy farmer and he lost half his arm in one of these things. He was grinding corn for feed one day and his shirt got caught. He just kept churning that handle though, and his arm went in. Stripped all the flesh off his bones, and ejected his ulna like a corn cob.* We called him Uncle Lefty when I was growing up, even though it was his left arm that went in, so he was actually an Uncle Righty. Showed he had a sense of humor about it.
*no not really
