We played all of the songs on the first Johnny Winter AND every day before we recorded them, so that when we got in the studio, it was totally easy, as we knew exactly what we wanted to do.
The plane is simply abstracting the power stored in the wave by a distant gale, and using it to counteract gravity. And if the work be continued long enough, or a multitude of planes be continually drawing on the reservoir of power, the wave must inevitably be flattened.