Mobile Equipment used in Stunting Activity?

We insure a non-profit organization that uses miniature vehicles in parades and other promotional activities. The question has come up as to whether the mobile equipment exclusion on the CGL form would apply to a claim if one of these vehicles accidentally ran into someone and caused bodily injury or property damage. The cars would definitely not be racing or speeding, but are they engaged in a stunting activity? Or, should we be concerned about the auto exclusion? What is your opinion?

Ohio Subscriber