I once saw a website where the photographer had a similar types of pictures, I think it was using a slit camera. These were taken with tablet in pano mode.
The train is moving west to east (left to right). Top photo, the camera panned right to left, into the moving train. Bottom photo, panned with the train, moving with the train, maybe not the same speed.
""The world is full of obvious things which nobody by any chance ever observes…""
— Arthur Conan Doyle
“The Hound of the Baskervilles”
""Mathematics...