The marble is a 32-34kg solid concrete block that was incorporated into paratrooper training. Physical activities with the marble included a 10km run and physical training periods of 40 minutes. The marble even became airborne. It was attached to each troop with a 5 meter rope, resembling the weight of a full kit. The marble was the idea of the late Nic Visser. The late Tico Brink (trainer), acting as instigator insisted on bringing hell down to earth, made training with the marble compulsory. The earliest known course in which this infamous marble caused blood, sweat and tears was Course 6V in 1962.