Using pressure and pneumatic principles create a participatory kinetic sculpture based on the principles use in an air gun or nerf water pistol.
Adjustable Water Aperture
The public gets on the bike, pedals to compress air which is then stored until a certain PSI is attained. This in turn sets off the trigger which the propels the water straight up like Ole Faithful. The aperture device would allow for different effects
1. Multiple stream shower like burst
2. Sustained single thin stream
3. Wider single powerful burst
4. Slow bubbling for a sustained time