You stand under streams of water with an umbrella and you can hear music in the water:
"RainDance is an interactive sound installation by electronic media artist Paul DeMarinis. The installation uses water to create non-water sounds. Jets of water modulated by audio signals carry sound vibrations that are inaudible to the human ear. The sounds cannot be heard until the water jet is intercepted by a large umbrella. The sound is then decoded and resonated from the surface of the umbrella. The umbrella thus becomes a new and different kind of loudspeaker."
Kind of interesting . . .
