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.
They wanted someone "Like Frankie Laine." At the audition, Frankie Laine showed up.
Ear Worm: The Theme Tune, Lily Von Sthupps "I'm Tired" and the musical number "The French Mistake"
Ensemble Darkhorse: If you don't finish watching Blazing Saddles with Mongo as your favorite character, then you have no sense of humor.
"Funny Aneurysm" Moment: From the song "I'm Tired", the line "Let's face it. Everything below the waist is kaput!" is not as amusing since Madeline Kahn passed away from ovarian cancer in 1999.
"Mongo! Santa Maria!" Mongo Santamaria was a famous jazz musician.
Governor Lepetomane: "Le Petomane" was the stage name of a French entertainer who was famous for being able to fart at will. It's not a coincidence that one of the most famous scenes in this movie is "cowboys farting after eating beans".
One would have to be a fan of old American movies to get the following:
Olson Johnson: Our fathers came across the prairie! Fought Indians! Fought drought, fought locusts, fought Dix! Remember when Richard Dix came in here, and tried to take over this town!?
Similarly...
"You'd do it for Randolph Scott." Scott was the Western hero for decades, but by the time this movie came out, he'd been retired and out of the public eye for ten years.
Vindicated by History: A variant as it was extremely successful from the start, but it was derided by critics as crude and dumb, while today it is considered one of the supreme comedy westerns of all.
Blazing Saddles was ranked #6 on the AFI's "100 Years..." list of the best comedy films in the last 100 years.