transitional songs

It became clear early on that since there was no dialogue in the Musical, any transition between scenes would have to take place in the songs themselves.  In a few cases, songs had to be created to make these transitions. 

awake

In the script, the dream scene is at the beginning of the movie.  But for the Musical, it made more sense to put it after the dream scene and allow it to set up the Subway song.  So James Busvlogger wrote lyrics that point backward to Tucker's kidnapping and the Dream Genie's visit, as well as point forward to the Subway scene, and the day when Rhett would actually grow a beard.

somebody stole my dog

The song Un-umbilicalized Smoke Emission Tubule (USET) was the first to be completed, so it offers no explanation of who the Professor is or why the boys seek him out.  The Armstrongs added this song, a scene not in the script, to help get Rhett and Link into the lab for the USET song.   

where did you go?

After the guys meet with Professor Mac in the script, they see Tucker on a prerecorded show.  It's not clear why they stop their search for their beloved dog to first have a chicken leg argument, then watch TV.  In the Musical, the chicken leg discussion becomes a web show which sets up the meeting with the Professor.  So there needed to be a reason they would leave the lab and go watch TV.  The easy answer is they're 14.  And this song was added to bring that out: the two are worried about their situation and don't know what else to do.

straight line tours ad

Since the song I'm Coming Home was written for another movie, it includes some details that needed to be explained.  One, it's snowing where Tucker is and two, the dog has a desk job with a picture of Rhett and Link on his desk.  The rap explains that Tucker has not been kidnapped by rednecks, but hired by hipsters in Portland. The ad brings out the repeated line from the dream scene, "The shortest distance between two points is a straight line."  And it offers backstory on Tucker's later journey.