The tiny railway line - on a canal boat

[Swamp Thing]

 

[DaveC426913]

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.

 

[Swamp Thing]

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.

 

[Swamp Thing]

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