hmmmm, have mixxed feelings as to whether the sky should be cropped or not, but it is worth a try to see the difference. The steam and contrasty colors make the image for me, would like to have seen just a little more space ahead of the train. Enjoy your work Greg, and I think it would be great if you had time for more input on others' work on usefilm :)
I love the way the lines move inside the frame, adds a 3d effect to the picture... the steam adds more drama, yet I feel the sky is distracting... wish if there was more clouds, you may crop a little from it... other wise it is a great capture..