A friend of mine that lives in Marion shot this video..
Talk about big power for a local! A SD70M-2!
Note the conductor riding the first gon protecting the shove.
I checked the CN roster at: boxcars - CN Lines SIG
It confirms what I mentioned in the above reply:
This steel CN boxcar is painted a distinct blue colour as are most of (all?) the others in the series CNA 794xxx series. It was built in 1970 by Pullman Standard and was originally numbered in the GTW 309000-309299 series and used in automotive service.