Looks like we are looking for candidates for the Darwin awards.
Put simply, Bob Hoover was a test pilot for many years and knew exactly what the structure of his Shrike was and what it would take.
Reading some of these posts makes me worry that people aren't using the POH, or if they are, are ignoring it.
Yes aircraft are safe to a level+'comfort zone', but don't assume you can go into that zone without consequences, unless, like Bob Hoover, you are a trained aircraft engineer and test pilot.
Still, I will happily read about these experiments of aeros in a Luton Minor on the Darwin Award website.
http://www.darwinawards.com