[screen: "Fourth season"]
[the theme from "The Flintstones" plays]
[a man looks at his watch, and pulls a cord on a whistle]
Homer: Yabba dabba doo!
[slides down pipe, crashes through window into car]
[singing] Simpson, Homer Simpson,
He's the greatest guy in history!
From the town of Springfield,
He's about to hit a chestnut tree.
Aah! [smash!]
-- 0:29 from 9F10 ("Marge vs. the Monorail"): is Homer
getting stupider?,
"The Simpsons 138th Episode Spectacular"