Balloon jumping is very simple. ah you oo is tie yourself to a balloon, whoso total lift is a trifle less than your own total weight. A man weighing 160 pounds, tor example, might use a balloon a total lift of 100 pounds, which would reduce his weight to a bare SO. But his muscles -would still be geared to move 150 pounds. As a result, tho balloon jumper can casually jump over lakes, trees houses, moving automobiles and almost anything else that comes in his path. And no matter how great the height to which he may jump, his balloon will always s him down as lightly as a feather.