I went with anything that moves unpowered or not that is not also a living thing is a vehicle so long as it falls within the light cone that could theoretically be projected from the park grounds directly upwards if it were in a vacuum.

Not many people agreed with me, but it’s a strict rule that I could imagine something like the military trying to enforce over a top secret area.

It blocks everything ambiguous so only the horse was not a vehicle.

Overall I think it’s a good experiment as it shows why it’s good to enumerate examples of what is and isn’t part of a rule in order to adjusted it the future.