prodding with a nav rule
The violence reported in #17 and #19 does not sound so bad really.
The Piston Provost came with a conventional builder's crowbar strapped to the central cabin pillar, by the instructor's left shoulder and handily in reach of his right hand.
We all knew it was there, but its only "victim" we knew of was the star of our Entry - in due course an Exceptional pilot. The instructor was later my squadron commander on 7FTS and an absolute gentleman.
Now, of course, I can guess that, while the story was real for us, it never happened.
Then again all of our instructors seemed to have come off Hunters at Jever and probably would not have known what a nav rule was.