'unbendable arm'

http://onlineaikido.com/blog/hangman-being-hanged.html
... 'unbendable arm' (tegatana) ...
http://www.youtube.com/results?search_query=unbendable+arm&search_type=&aq=f

“unbendable arm” video results 1 - 10 of about 10

http://www.youtube.com/watch?v=eUGLADziHUM

Kiatsu Massage Basics : Kiatsu Exercises: The Unbendable Arm

(Shin-Budo Kai)