Sometimes cars just don't see coupler to coupler. A few weeks back I photographed a couple that had done just that. It looks like the MNNR set them out for the CN to try and fix at New Brighton. The cars were coupled together, but you could see where the opposing ends had "bumped". Someone didn't quite clear the foul zone. The coupler for the reefer is actually strapped to the deck of the center beam flat. I bet that made one heck of a boom!