Pendulum / Falling Leaf Motion
Date	Location	Description
6-24-47	Mt. Ranier, Washington	Nine flat, shiny UFOs moving with skipping motion.
7-7-47	Near Medford, Oregon	Disc, on edge, moved south to north along eastern horizon, bouncing up and down "as if following contour of hills."[Section XII; July 1947 Chronology]
1-7-48	Columbus, Ohio	Round or oval UFO in level flight estimated at over 500 mph, making "elevator like" motions.
5-29-51	Downey, California	Large formation of glowing UFOs, maneuvered, moved with undulating "skipping" motion.
8-3-51	Near Pinckney, Michigan	Yellow light "moving in an undulating path." [Section VI]