Glacier, Alaska. Photo by Nils Öberg
Or will it be pulled by human power?
Will you set off a train of disaster by failing to set your alarm?
photo by Matteo Ianeselli
...or of glorious success by smiling at the lady in the coffee shop?
Just remember something that keeps life interesting: things might work out exactly the other way round.
Spot the Frippet: train. This word comes from the Latin trahere, to drag.