I love stand-up grappling. Gets me doubled over every time!
In other news, this post could help parse out the meaning:
Asagao is a beautiful combining of breath power, the use of fure aiki and elbow power. For the purposes of a drill you can do some interesting things dividing the energy, but every one of those principles are displayed anywhere in the body. Extendin ki into the fingers is meaningless without a developed body and understanding of how to use it.
Maybe in some Japanese traditions there has been this term "elbow power" to refer to what the Chinese have called "peng" (peng being the upward power of the ground projected through the bones of the body in an expansive fashion)? Fits in with the fact that "kokyu" is not a 1:1 translation with "neijin"-- because "neijin" has variants and skill-subsets that don't have anything to do with "breath." Just speculating here.