benlehman

I have heard the same joke with a different object, although I can't recall off the top of my head what it was. The joke seems to be that it is an anti-joke. There is no punchline, and you were dumb to wait on it.

I think that "Two Tramps Sat on a Rail" is a very different and possibly much older (behold the Chinese version.) While there is something of a "hahahah, you had to wait for the story that wasn't there" aspect to it, it also have some considerably deeper levels.