I was SO EXCITED to see a caboose moving on the tracks the other day, then I was so disappointed to figure out what was really going on.
St. Cloud, MN, BN tracks near Frigidare plant - I saw the crossing gates go down and a BN caboose crossed the street being pushed by a grain hopper, then another caboose, then a GP-38 that was also pulling a cut of cars - they were just rearranging "junk" in the yard. The caboose was not actually in service. Poop.
First time I'd seen an engine moving with cars on both ends though.