Skipping reproduction of image data is performed while maintaining the continuity of a moving image before and after a skipping point, thereby preventing the video buffer in the decoder from failing. Basically the idea is to add a wheeled platform to an electric golf cart enabled to steer by varying the power to the wheel; the result will be a sort of modern \u201cchariot \u201d: a two-wheeled platform drawn by an electric golf cart. The present invention further comprises methods and compositions comprising therapeutic vaccines, antisera and molecular constructs, comprising expression vectors and fusion proteins encoded therein.