Did you ever wonder what it was doing in the middle of Dumbo? Not just tonally but stylistically anomalous in a Disney kids' movie?
There were two main schools of animation in the early 20th century: West Coast & East Coast
West coast is what you think of as classic "Disney" - naturalistic characters, moving in naturalistic ways. Stories were wholesome and conveyed some moral
E.g
Until Dumbo in 1940. Walt Disney himself managed it at first, but then gave up on the project because dealing with WWII, striking workers, etc. was occupying too much of his resources
They rewrote the movie & added the Pink Elephants sequence
And that is why generations of kids have suffered nightmares since 1941. The end