Harness racing use a standing start. The sulky (informally known as a "bike") is a light, two-wheeled cart equipped with bicycle wheels. The driver (not a "jockey", as in thoroughbred racing) carries a light whip chiefly used to signal the horse by tapping and to make noise by striking the sulky shaft. There are strict rules as to how and how much the whip may be used; in some jurisdictions (like Norway), whips are forbidden. For exercising or training, the drivers use what is known as a "jog cart," which is a sulky that is heavier and bulkier than a racing unit.
Martin Puryear full-size two-wheeled cart in "The Load" sits poised as if ready to move at a moment's notice, with its twelve-foot harness pole parallel to the ground resting on a center prop. Mounted atop the axle of the cart is a gridded wooden box that encages a white sphere fitted with a glass aperture. The glass aperture faces the rear of the cart, an accessible portal through which a viewer can glimpse the complex interior structure of the wooden sphere. The cart is an immediately recognizable object, although from no particular time or place in history. Two-wheeled carts have been in