This Is Drivel

I remember the very end of a dream as I woke up this morning: A gleaming steam locomotive, one with lots of pinstripes and shiny brass, easing away from the platform of a passenger station and out into the yards, chuffing away.

As it faded into the distance I was snapped into full wakefulness by My Darling B, who crooned directly into my ear the appropriate sound effect:

“ZOOOM!”

Now, how did she know to do that?