Horrible but true: Whilst living working in NZ, a worker was awarded a large payout after losing one, [lucky] of his legs in one of those branch chopper things. He worked for a company that trimmed/felled trees, not forestry.
Anyway, the reason he was awarded a payout was simple. He was trained and repeatedly told, not to put his hands past the red warning line on the feed chute. Well he didn't, he pushed a branch in with his foot and got dragged in.
At no time was he ever told not to put his foot into the machine???
Common sense? Well I guess you have to teach that as well now