These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
"Funny Aneurysm" Moment: The song "Gary, Indiana". When The Music Man first debuted in 1957, the song was unintentionally funny due to Gary's reputation at the time as a bustling factory city (U.S. Steel) famous for vice dens of gambling and prostitution. In the present day, Gary is just another dying Rust Belt factory town with large numbers of abandoned buildings.
In a bit of historical irony, the King of Pop, Michael Jackson, was born in Gary, Indiana the year after the musical came out.
Ear Worm: a lot of the songs, including "Pick-a-Little, Talk-a-Little", "Shipoopi", "Ya Got Trouble", "Iowa Stubborn", and "Marian the Librarian."