Dear Ticketed Passengers,
It takes a lot to laugh but it takes a train to gather momentum. The glory of the metaphor of the train is the gathering of momentum, and I offer you some songs to illustrate my point. Use them to pick up speed, or to gather your forces.
With a train the sound is also of going, the decreasing, dopplered -ainnnn sound; the sound of being gone. You can use it to let them know you have left.
