Michael S. Lorrey [firstname.lastname@example.org] wrote:
>Whenever I hear of a UFO
>report that includes 'rapid changes in direction', I know what is
>actually going on, and that the eyewitness is ignorant of flight dynamics,
>and lacks an ability to think in three dimensions. Note that people have
>poor depth perception at long range.
Also, most UFO sightings are lights in the sky where people have little or no fixed reference points, and often viewed through shaky binoculars or camera zoom lens. In the circumstances, any reports of rapid changes in speed and direction are highly suspect without supporting evidence.