David Hogberg wrote:
> This is probably related to a phenomenon I noted several years ago,
> in an airport. Observing the poor-quality video on a closed-circuit
> camera, I found that if I clicked my teeth together the picture would
> partially black out. I'm pretty sure the tooth-clicking caused a visual
> jump, blocking out a portion of the slow CRT scan.
Try that too much in U.S. airports and you'll find yourself handcuffed
and taken in back for questioning.
Paul Smith
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