Why aren't we all doing this?

http://youtu.be/Ln9fuR8uwIc?t=36m48s

I'd give it a try if I thought I understood what the nature of the shear is that is being exploited and how to work it. I am inclined to think that whatever the nature of this "longitudinal shear", it isn't terribly commonplace, but if I were wrong about that, I'd really like to know!!

Evan Ludeman / T8