The tiny railway line - on a canal boat

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The discussion centers on a model depicting a railway adjacent to a canal, featuring canal boats. Notably, the canal boat in the model is the same as the one in which the model is located. A moment of confusion arises when a smudge on the computer screen resembles flotsam on the canal's surface, creating a realistic visual effect as the camera pans. Additionally, a segment at 08:58 showcases a demonstration of water flow from an orifice, highlighting the characteristic spiral patterns of such movement.
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That's a model of a railway - next to a canal with canal boats - on a canal boat in a canal - next to a railway.

And the canal boat - that's in the model - is the very canal boat - that the model is in.
 
There is a bit of grease/dirt on my computer screen. At one point, it looked like it was some flotsam on the surface of the canal. As the camera panned across the scene, the flotsam drifted along the canal in a most realistic way.

It weirded me out for a moment.
 
And at 08:58, there is a nice demonstration of water flow from an orifice, complete with the spirally features typical of such flow.
 

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