Leagas Delaney task was to increase the sales of a Spring water brand in selected supermarkets. The agency has decided to reach the potential customers before even they get into the superstores. In entering the underground parkings, people looses their favorite radio wave. Rajec interfers then with the main and popular radio frequencies in Czech Republic in replacing the signal with a radio commercial with a sound of nature in background, with only Ipods and FM transmitters. With a low investments, sales rose