Static images on a wall that appear animated as the train moves.
@marcioaleks clever, works in the same way that a zoetrope works.
https://www.reframingphotography.com/content/animating-photographs
How to make a zoetrope | Reframing Photography

@robchapman @marcioaleks the train moves, accelerates ; the camera takes pictures every nth second. This last step produces a stroboscopic effect our eyes (and brain) see as a continuous movement.
I mean this illusion is not visible with naked eyes, without stroboscopic effect. Daylight, you need a camera, or to blink your eyes; nightly, the artificial 50Hz light might make the magic happen.

PS: frankly, I keep being a bit skeptical about this movie. More than ever before, illusion can hide everywhere in the digital world. The fascinating part is that it could anyway help us understand the reality behind our senses.

@7tonin @marcioaleks it's known as illusory Motion, where any optical illusion appears to make static images move. The Stroboscopic effect is the most common illusory Motion. However it is not a new thing that requires a camera, as the effect was first described by Aristotle between 384 - 322 BC
It is like a giant zoetrope, however I do think in this instance the camera plays its part in what we as viewers see here - but, the only way to truly know is to go on that train and see for ourselves.
@robchapman @marcioaleks Hope this place is not out of our reality.