When he's supposed to be babysitting Bart and Lisa, but is at the Flanders house with Rod and Todd. ("Natural Born Kissers", was it?)
GRAMPA: Now it's you're turn Bart.
ROD: I'm not Bart, I'm Rod.
GRAMPA: There you go with that smartmouth! Lisa, run outside and cut me a switch!
(Todd runs outside.)
Here's something that resembles the LETS speech, in case anyone cares to read it.
"Let me tell you about the time I caught the ferry over to Shelbyville. I needed a new heel for my shoe. So, I decided to go to Morganville, which is what they called Shelbyville in those days. So I tied an onion to my belt, which was the style at the time. Now, to take the ferry cost a nickel, and in those days nickels had pictures of bumblebees on them. 'Give me five bees for a quarter', you'd say. Now, where were we? Oh, yeah...the important thing was that I had an onion on my belt, which was the style at the time. They didn't have white onions because of the war; the only thing you could get was those big yellow ones."