Farmer Snoggle just couldn't figure it out. The salesman had said that the Plow Potato could clear as much land as a team of oxen, but once he had it in harness, it just laid there. Not even dangling a stick of butter in front of it seemed to get it moving.
He was even beginning to suspect that maybe the salesman hadn't been entirely honest with him.
I'm not even going to try to explain how this happened. Some things, mankind was not meant to know.