I was going to submit this back with the first start of the series, and apparently I either passed over it, or didn't think it worth of submission at the time. I was mistaken if the latter was the case.
No, I'm not referencing the flash port on top of almost every single SLR made (except for the full-frame ones). But a fast-moving train.
This Z-train double-stack (also seen here
) was moving fast down the UP transcon near Topeka, KS. On the point is ES44AC (C45AC-CTE) #7700 and SD70M #4424.
Canon EOS 30D
Canon EF 70-200mm f/4 L USM
ISO 100 @ 1/400, f/8