I worked with someone who was drilling postholes on his farm.
Somehow the auger snagged his sleeve, picked him up and threw him.
He landed without the shirt but with two broken arms and two broken shoulders,
and it happened in such a blink nobody could react.
I think I would just hire it done, rather than renting an auger.
Rent one that fits the 3pt hitch of the little tractor. It would take
quite a root to throw a little Kubota or an old Ford 8N
My old neighbour - Reg - had no electricity or running water -
but he had 3 Ford 8N s !
https://en.wikipedia.org/wiki/Ford_N-series_tractor
Each had a name and a separate purpose
and according to Reg a personality ...
One Christmas, we sat by his stove and listened to scratchy
Johnny Cash - 78 rpm - on his crank-up player ..
.. and had a beer.
John T.