Chattanooga Choo Choo - vocal intermezzo

Intended for educational purposes a couple of years ago, this personal rendition (piano solo with vocal intermezzo) of an old favorite from Glenn Miller's Songbook: Gordon & Warren's "Chattanooga Choo-Choo".
Key of the score forced to some unexpected high-pitched singing.

This rather hilarious effect sharply contrasts with Tex Beneke's original and uncomparably soft baritone voice, as a matter of fact....