It just provides its own punchline

[substitute]

I just saw an ad on TV for the glories of Springfield, MO as a tourist destination. The ad told me to go to http://www.springfield-fun.com/ and you should too. Then, click on the "Things to Do" link.

Edit: I noticed that you don't get the funny when you click that link in the left navbar, only when you click it in the main body frame.