Debating whether to see a doc about it. Does nikyo have much record of causing actual injuries?
It felt like the radius and ulna, or possibly the lunate and one of its neighbors, were grinding together when it happened.
"Anatomical snuff box" is only vaguely tender so I don't think it is a scaphoid fracture.
(btw, the nikyo was actually done right what was done sub-optimally was me getting out of the way by falling fast enough)