Six loons swam in a tight circle less than six feet in diameter. Every now and then, a loon would dive into the center of the circle and vanish, and a little while later one would pop up to the surface and rejoin the circle. The whole thing smacked of the occult. After a while I felt I was intruding on a private and unquestionably magical ritual peculiar to loons, and ought to move the hell on before I offended. So I moved on.