Troy: Dr. Linus Irving of the Sloan-Ketterling Memorial Institute writes,

Troy: Dr. Linus Irving of the Sloan-Ketterling Memorial Institute
writes, "How does Matt Groening find the time to write and draw an
entire `Simpsons' episode every week?" For the answer to this, we
went straight to the source.
[through a window, a shot of Matt at a desk]
Matt: [seeing the camera] Get out of my off --!
[picks up a gun, shoots at the camera]
Troy: Of course, what Matt _meant_ to say, according to his attorneys,
is that he couldn't possibly do it alone. And he insisted that we
make time to acknowledge the hard work of everyone who makes "The
Simpsons" possible.
[very quick shot of lots of names]
-- Hey, they took the time,
"The Simpsons 138th Episode Spectacular"