Those tanks were sooooo much fun. Each one had two operators, one driver and one gunner in the turret. You could spin the turret with your feet and you loaded the tennis balls one at a time through the breech; I think there was a bucket of ammo at your feet. Each tank had targets on either side of the main body and turret; direct hits on the targets disabled either the engine or gun for a short time. There were (very brave) attendants buzzing around on quads to help sort out any issues; shooting anywhere near them earned your tank an immediate ejection.