Looks to me like its time for the SPUDGUN! Also known as a potato cannon. Either the compressed air type (expensive compressor) or the hairspray powered type (cheap but lower muzzle velocity) will throw a chunk of potato well over 100 feet into the air with considerable force. It will do less damage than than a shotgun with a better chance of actually moving the plane than a BB gun or arrow. They are easily assembled from PVC pipe and will provide an afternoon of great fun. Here in the States they are not considered to be a firearm but local ordinances my apply. Lots of great websites with construction directions. Mine will shoot a two inch potato projectile over 100 yards.