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A very clever (imo) artist has developed a simple trap for autonomous cars --
    https://www.youtube.com/watch?v=thuN2HD6m2s [youtube.com]
Less than 90 seconds of video, no sound. If you get it right away it's only a minute.

Oh, and if you didn't get the title, there is this,
https://en.wikipedia.org/wiki/Heffalump [wikipedia.org]

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