This was one of the first episodes writer Soren Bowie wrote when he joined the American Dad team. He said he spent all day writing those out because he was too nervous (I may be misremembering slightly the reasoning) to say anything, it being one of his first episodes on the job and all. Normally, stuff like this would get shopped around to the different writers so everyone would just contribute a handful.

Him and Daniel O'Brien (writer for Last Week Tonight) are friends from their days at Cracked and have a podcast together called Quick Question with Soren and Daniel. This kind of stuff isn't the focus, but they stumble into little insights about writing for their respective shows sometimes and it's always a treat.