I have yet to fly an aircraft that can not be landed or taken-off in less than the distance specified in the flight manual.
The CAA and the insurer will ignore the 50,000 previous times you landed in a 50 knot crosswind if you break the aircraft while landing in a 20 knot crosswind when the max demonstrated is 15.
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Life's a Beech,
Your instructor would have been guilty of manslaughter if you had killed yourself.
The point is that FullyFlapped is by definition claiming to be a test pilot and consequently will have prepared in advance a test flying programme, have appropriate test cards as well as data obtained and will have a report that because of their credibility as a test pilot will be acepted.
I have been involved in test flying for a few years but still operate under the supervision and guidance of a more experienced pilot (as well as a flight test engineer) and must submit all reports through the designated senior test pilot.
Getting away with it and living to write an email is not test flying.
Regards,
DFC