I once saw one of the original "Galloping Geese", quite by chance, in of all places the Knotts Berry Farm theme park, which faces Disneyland over the road in California. All a bit hometown-folksy compared to the Disney effort, but they have a number of rail themes, and riding round in a steam train on what was a representation of the Old West, and having been held up by gunmen on horses who leapt aboard the train, walked up and down the cars with six-shooters bristling, and insulted the clothing of the female passengers, to the delight of the Miss Taunton of the era ... until it was her turn ("Miss K-Mart", indeed).
Anyway, on we went, and suddenly there was a real authentic Galloping Goose pushed down a spur, too quick to get my camera ready. I believe they still run it on special occasions. A Goose was bits of a 1920s Buick car mechanicals, with home-built adaptations and a sort of half-hitch trailer. It apparently inspired Colonel Stephens in the UK to do the same sort of thing with old Ford Model Ts and some amateurish-looking bodywork. The one in California is actually very worthy of a proper rail museum, original RGS silver paint scheme and such like. There are videos of it running there on YouTube.