When I had a chance to audit Matt Graham’s A RAINBOW security course, parts of the medical and restraint escape portions were done in moving rental SUVs. As riotous as those exercises were, he told a great story about working with some Scandinavian SF personnel in rental vans/SUVs. The medical blocks involved evasive maneuvers and live goats. They had the foreign operators drop the vans off on their way back out of the country, mostly because they could pretend to not speak english and avoid answering questions.