If we look at our
windswept gallery in the bonsaiTALK museum, we can see that windswept trees bonsai of this "passive" type abound.
Consider just a couple of examples of this type: (click to enlarge)

Granted, some natural trees do develop in this form, and windswept bonsai are frequently styled in this way. However, when we look at some natural trees, we might see something different happening.
This tree has formed into an aerodynamic shape overall, but the trunk is hardly passive. It ripples and undulates and actually seems to be alive.
Please click this offsite link to open an interesting example in a separate window:
http://www.cyprusbyclick.com/CITY_G...s-Georgious.jpg