[Erasmus]

I don't have any examples at hand, but lots of the technicians in the movie industry were (and are) hams.

So when the techs were asked to come up with some 'morse code' effects, they could be counted on to embed some hidden message--often a snippet of a QSO with their own call signs.

I know there are some examples in the Disney oeuvre.

Here's a link I found.

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[gcruse]

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