Stumpy attempts to prove that Smileyland's sheep are aliens in disguise.
"Let's Play Leapfrog" contains the following tropes:
- Alien Abduction: The aliens abduct Stumpy from the couch he's sitting on and examine some acorns he happened to have with him.
- Alien Animals: Stumpy comes up with the idea that all of Smileyland's sheep are aliens after an incident where they abduct him, but nobody believes him.
- All Just a Dream: Near the end, it is revealed that everything was in Stumpy's imagination.
- Or Was It a Dream?: Kaeloo comes across Stumpy a little while later, and he seems to have been hypnotized by the aliens.
- Cassandra Truth: Stumpy's claims of being abducted by aliens are true, but nobody believes him.
- The Cuckoolander Was Right: Stumpy turns out to be right about Smileyland's sheep being aliens. Not that anyone else believes him.
- Double Entendre: Stumpy claims that the aliens examined his nuts. He's talking about acorns, but Kaeloo's reaction makes it clear she thought he was talking about the other kind of "nuts".
- Skewed Priorities: Stumpy is sitting on the couch playing video games when aliens drag him into their spaceship using a tractor beam. He starts to panic, not because he's being abducted by aliens, but because he didn't save his score.
- You Have to Believe Me!: Stumpy's friends don't believe him. His friends wind up taking him to a doctor/psychotherapist.
