A frame arrangement of a motor vehicle body accommodates at least a windshield and has a cowl frame part that runs in a transverse direction of the motor vehicle on an upper side of the windshield. The weight and movement of the individual causes the platform to tilt in any direction, thereby attempting to throw off the balance of the individual, causing the individual to work on maintaining balance while on the dynamic platform. A light source is located in the tube midway between the proximal end and distal end.