Sounds like time for an experiment. A couple (or few) people in cars trying to recreate the phenomena, a coupe observers/photographers, all connected by radio and carefully documenting the timing of all events.

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Don of Borg - Cool, Calm, Collective.

"Within the next generation I believe that the world's leaders will discover that infant conditioning and narco-hypnosis are more efficient, as instruments of government, than clubs and prisons, and that the lust for power can be just as completely satisfied by suggesting people into loving their servitude as by flogging them and kicking them into obedience." -- Aldous Huxley