TV Trope: Don’t Explain The Joke
Britta: Hey, can I run something by you? I was thinking of pulling a little prank tonight.
Jeff: Alright! April Fool’s prank.
Britta: So you know how they have live frogs in the anatomy lab?
Jeff: Oh yeah.
Britta: So I was going to sneak in there, get a frog and then tomorrow when Senor Chang’s class comes in there will be a frog on his desk wearing… [she pulls out a tiny sombrero with Chang’s name on it] Ta-da! [She grins at him].
Jeff: Oh, you’re done!
Britta: Did you read the hat?
Jeff: Senor Chang.
Britta: Yeah! Ohhh, you don’t get it.
Jeff: I guess I don’t.
Britta: The frog is Chang.
Jeff: OK, I did get it… It’s funny.(1.20 The Science Of Illusion)