November 23, 2013
In case you doubted you are witnessing the sculpting of air, check out the curlicue vortex created off the RB9's front wing as it twists around the sides of the car.
Interesting how it appears to "turn on" and off like a switch. as soon as Webber reaches a certain speed or hits the brakes. That may be to do with the conditions needed to make the vapor visible, perhaps aero guys out there can shed some light.