I love the radio show Car Talk on NPR. They are supposed to say before a commercial break, This is NPR." But since they are constantly making fun of themselves (and anything else they can find to laugh at), they usually say it in a way that shows people can't stand the fact that such an awful show would be on NPR. For example, the other week they said, "Even though Van Gogh lops off the other ear when he hears us say it, this is NPR."
They had a mythology one recently, "And even though Icarus heads back for the sun when he hears us say it, this is NPR."