"Oh no! We're being attacked by Gef the Talking Mongoose. Wait a minute, say, Swotty McCliche, weren't you studying how to defeat talking mongooses just this morning?"Common in Edutainment Shows. May be the payoff for a Reading Is Cool Aesop. Compare Strange Minds Think Alike and Lecture As Exposition.
"Oh yes, I totally forgot. How conveniently stupid of me!"