Classic joke. I once printed this out, and hung it on my study office door with the title "Nate the Snake (funny joke)". It made me laugh every time I saw someone stopped to read it. I actually think it's well written and enjoyable in its own right, and the punch line is a perfect end. When I read it, I had forgotten that it was supposed to be a joke before getting to the end, which made it even funnier!
I sat my wife down to read it telling her that it was the funniest thing. Of course I know she HATES puns. So 2 hours later she finishes and just gets so mad. From the other room I hear, "Are you fucking kidding me?" and I laughed all night. I still tease her with the punchline. And yeah, it's great that this long, deep, philosophical story ends with the greatest anticlimax ever.