inflatable boat-tail
 

https://insideevs.com/news/338543/te...to-parked-car/Looking at this 'soft' crash test 'car' and a little stretch of the imagination delivers us part way to Fachsenfeld's 'extensible' tail of the 1930s.
Or Samuel Calthrop's air-resisting train of 1865..................
https://www.youtube.com/watch?v=ry54IG972LI

I watched:
Art Deco's Impact on Railroads
It starts with the McKeen mororcar. Those ran right past where I grew up before I was born. Trophenwagen-era stuff.

But they wedged the nose and rounded the tail.
https://s3.amazonaws.com/McKeen/Upda...e+Iso+View.png
https://mckeencar.com/

Faster backwards? I can repost my Type II inflato-tail if you like.

edit: I watched yours. A prop-driven monorail at ?t=163!