Nope, neither. Its the sound of Freedom, as we say.
Take some hills and valleys, the promise of a sunny day with the fog lifting, and some bad boys out to 'get'em'. That duggaduggadugga ain't gunfire but shutters.
Just lie back in your chair with a fine Ale, and watch them go by.
They are in the 'Mach Loop' low-flying area (LFA).
About those tight turns around mountains and cliffs: those who prefer the sea for their jollies also like to see high-speed turns.
That should impress a few whales.