It is not a ride, it is not a show, but it is an awesome treat for anyone that is able to catch it in action.
The Mystic Fountain is a great piece of entertainment at Universal's Islands of Adventure due to its comedic lines and well-hidden fountains that spray guests around the fountain. Every now and then the fountain even puts on a water display.
The comedy within the fountain comes from guests nearby that choose to talk and interact with it. The fountain makes wise cracks about guests' style and things that they say. Definite must find when you are at the park!