There are a couple from king of the hill I like cause they're dumb.

"They keep making TVs bigger and bigger and smaller and smaller. Soon there won't be any average sized TVs anymore."

and from a movie i like

"did you know god spelled backwards is dog?"

"So?"

"Makes you think, doesn't it?"

One which is a bit similar to yours: "An empty stable stays clean, but no income comes from an empty stable."

That, and one which I've been hearing very often lately...

"Ohez noez! We killed Turkey!"

Turakii

"Do not call the police. You cannot find us. You cannot trace us. Sincerely, Calvin."~Calvin (From the comic Calvin and Hobbes by Bill Watterson)

-K-