Pardon Me Boys / Is That The Chattanooga Choo-Choo

You've got your Train Whistle Blues, your Train Whistle Boogie, some Different Trains, a Train Song, oooh a Train Song with Mr. Waits, the First Train Home, the Last Train Home, and I'm pretty sure we used to bet pennies on who could come closest to identifying whistle-chords as those trains rolled through Northfield during Music Theory II.

(Common train chords: A Major 6th; A7; and c# dim7. Check it out: Train Horn Chords.)