Here is a brief background on this physics area of study from wikipedia:

In physics, fluid dynamics is a subdiscipline of fluid mechanics that deals with fluid flow—the natural science of fluids (liquids and gases) in motion. It has several subdisciplines itself, including aerodynamics (the study of air and other gases in motion) and hydrodynamics (the study of liquids in motion).   Some of its principles are even used in traffic engineering, where traffic is treated as a continuous fluid, and crowd dynamics.

We hope you like the video and if you get a chance with the right camera see if you can capture a similar pehonemon.

thanks to Gallery of Fluid Motion for the great info