The Vortex Fountain eschews gentle, soothing streams for a powerful water funnel. The illusion of a standing block of water is created by an acrylic case hidden by transparency and water cascading down the sides, and the vortex itself is formed through the combination of strong, alternate currents of water that collide in the tank. Depending on the angle from which you view the fountain, it alternates between a majestic restraint of nature and an oversized science experiment involving expensive two-liters. Here's a clip of the Vortex Fountain in full vortexness:
@DustyButt: Back in the days when I was evil, we used to be more stealthy on our bubble/fountain mission. Liquid laundry Detergent in a small baby food bottle, whipped at high speed (from a moving vehicle) into a traditional fountain. The glass would shatter and within minutes there was a bubble fountain mess that would surely scare the EPA.
(Please note that I now deeply regret the stupidity of youth mixed with a considerable amount of alcohol/THC and apologize to whomever had to clean that up.)