'THE FALLING LEAF" OR PENDULUM MOTION in UFO Reports

 The motion was described as falling or moving through the sky like a "falling leaf." It was description of the back and forth, swaying, twirling or rotating motion noted by some observers of unidentified flying objects. Some of the most intriguing cases indicate a unique motion observed. Arnold in June 1947 noted the nine objects moved like stones or saucers skipped across water ( visualizing that it might be termed a bump, glide, bump, glide), others would indicate something of a swaying back and forth with a hint of a twirling motion, and some others would note a rotation or oscillation in the object or objects seen. 

Here are some dates and places for such reports:

Oct. 11, 1951 - Minneapolis, Minnesota

March 19, 1952 - Oakland, California

Feb. 6, 1957 - Philadelphia, PA

September 3, 1965- Exeter, New Hampshire

1966 - Washlenaw County, Michigan "Swamp Gas" case.

See Richard Halls' 1964 book "UFO Evidence" and Hynek's "What You Should Know About UFO's."