Henry, Henry!
<<the original, the one and only, never to be forgotten, Blue Note. >>
Oh no!
Not the original, and certainly not the one and only.
A venerable instructor of mine was taught (at Pensacola, WW2?) that the time to pull out of a dive in a F4U was when you hear the "Blue note". he said he had no idea what that would sound like, but when he eventually heard it there was no mistaking it.
Guess the F4 predates even the Meatbox?
Incedentally later he was on the second RN helicopter course - on the R4. his instructor sent him solo after 3 1/2 hours, saying "You now know as much as I do". The instructor then had 7 rotary hours! Sounds like a recipe for a brown note!