"Chris, where have you been?"
"I don't know!"

What I love about Family Guy is that it can always be trusted to take the most random, high-concept joke and then stretch it out longer than you'd ever imagine possible. See also Stewie Griffin's "Rocketman" (previously blogged, with a different link, way back when).

Incidentally, finding that in the archives just reminded me of Leonard Nimoy's "The Ballad of Bilbo Baggins", which fried my brain all over again.