Weird

So here's the joke:

Knock Knock
Who's There?
The Interrupting Cow
The Interrup.......
Mooooooooooooooooooooooooooooooo

I don't know if I typed that to read or what. It is really peculiar though that I heard the joke twice in the last week from the two most random of media sources. The first was the movie Half Nelson and the second was a DVD of the show Dr. Katz Professional Therapist that aired in the mid-90s on Comedy Central.

I'm not sure what to make of it. Maybe I am an interrupting cow.