Description:19 55 30 00 Aquatic sport. Germany. Invention of a prototype of the ancestor of motorcycle ski. Close-up of the prototype. Close-up technical, stealing details, helixes. Demonstration, machine slides on the water. The skier steers at the same time the small engine which tows him, more pilot's need of the boat. Water-skiing miniature. Speed, image in accelerated, they cross the lake, choreographs. Funny, unusual image. Impression of madness.