I have run into unintentional implementations of this twice. Once I was racing a Hobie cat sailing catamaran off the coast of Laguna Beach, California and I thought I was being followed by a jet plane. Looked around and there was nothing but wind and waves. I was on a broad reach, had one hull out of the water and was really smokin. Then it occured to me that the wind in the rigging and the tension created by the hull slipping through the water were setting up vibrations that was causing the whole rig to sing in a high pitched whine.
More recently I was biking along the southern outskirts of Phoenix next to the Tohono O'Odham reservation and I was sure that I was being followed by a flying saucer. It was the same sound as saucers make in Sci Fi movies. Actually raised the hair on the back of my neck which is the only hair I still have left to raise. Then I realized it was wind setting up vibrations in the high tension wires far above the roadway. Even though I now knew what it was I looked back a few times just to be sure I was not being followed.