Why would you bother. Rock it left, right, forward, back. Hole slightly expands, sign pulls out. Why would you want to try and get a hand saw (!) at an angle to cut it flush to the floor. A hand saw would also never cut flush to the floor as the handle and your knuckles would be in the way. You'd then have to dig the remaining 6" out with a shovel. With absolutely no leverage.
Even the stuff she says she does is truly a mind blowing logic vacuum.
If you were able to tell any story you wanted, surely it would be that you pulled it straight out with your bare, self proclaimed gnarly, hands? Gently, carefully, soul destroyingly, hopefully, restlessly, pulled it out.