Editing Vortex Cannon (section)

== Why This Works ==

A ''Vortex'' is when you have a fluid spinning around an axis. When water is going down a drain, the "whirlpool" that forms on the drain is a type of vortex, where the water is spinning around the center of the drain. The vortex cannon is firing a spinning vortex of air at the cups, knocking them over! When the vortex cannon is first filled with the fog machine smoke, the shape of the vortex is made visible. The "smoke ring" shapes that are fired out of the vortex cannon are known as a ''Toroidal Vortex''. A toroid is the technical name for a ring, and the smoke in the rings is spinning around a ring shaped axis, making it a vortex!