With one hand, the castaways would hang on to a rope with several knots tied into it. The rope would be tied to one end of a heavy log. The other end of the log would be connected to a pivot point on a platform that the castaways would stand on. The castaways would start at the knot closest to the end of the log. After a set amount of time, they would change hands and move one knot further down the rope. This would increase the angle of the log at the pivot point and increase the weight that the castaways would have to hold. The castaway who held on to the rope the longest would win.