There is a more lyrics for the song here

http://www.thepacket.ca/index.cfm?sid=77484&sc=371

and mention of hearing it played on the radio.

Lyrics from this web page are:-

When you're on a railway train, never look out of the window pane.
I did once to my regret; I'll never do it again.
It was just like this you see, one of the passengers said to me,
"You might look out of the window and see when the train will go off."

I looked out of the window, my hat it blew away,
I stooped down to pick it up like an idiotic jay,
My trousers they were tight - and burst! The passengers from behind said,
"Oh what a short shirt you have on, you'd better pull down the blind"