Is it possible that the train shape resembles brooms?
Although it has been determined that this is a motorcycle/sidecar duo, brooms would have been fun. As long as there were legit seating a la how the movies completed their shooting, and not just straddling a broom for a four minute ride.
But with back and head rests, so your head doesn’t roll off during the spike portion.
I don't know. My head might still roll of exhilaration on this one.