First time I dropped a bang was in a Jumping Bean T4 on an air test near Düsseldorf. Nobody noticed - or maybe they were used to large bangs from a few years earlier!😈
In in later life, I used to do it pointing at the ship at the end of an air test. 40k, roll inverted and pull. Trick was to recover before exceeding the IAS limit on the big tanks.
Happy days!
Mog (WIWOH!)