Video of interesting aural and visual stroboscopic effects on the Renfe train from Barcelona to Vich

A malfunction of the public address system produces a rather pleasing strobe:

At the end of this clip, a crude example of the wagon wheel effect, caused by what the brain, fooled by the camera, takes to be a succession of evenly spaced, identical Quercus ilex:

More educational train journeys here.

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