Life is like a train!
A roaring rushing train!
You get on at the beginning,
You get off at the end.
The train inspiring this similistic ditty is, of course, the once fabulous 20th Century with its redcaps, plush compartments and other amenities. In the new revival of the musical screwball comedy , On the Twentieth Century, the four tap-dancing porters (no wheelies needed back in 1932) who introduce the 2nd act with that ditty stop the exuberant show.
For more about the show, here's a link to my revie