Characters
Sure! Make a musical! The new Don Lockwood! He yodels! He jumps about to music!
— Cosmo · Singin' in the Rain

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The proposal to make a musical is followed by a compressed description of a transformed performer. Yodeling and movement reduce that new identity to conspicuous actions. The list makes the imagined change vivid, while the excerpt does not resolve whether the suggestion is enthusiastic or mocking.
Context reviewed