Though I should note that on my shugoki I finally obtained the unique pommel for my kanabo, which had the throw distance set pretty high compaired to the zero throw distance I was running with.
I used to compensate for the lack of throwing distance with a lvl 1 feat that increased my throwing distance but now that I have both I feel that when I throw people they fly away at an increased phase, much like you did in the GIF. So hey, maybe it's those two things stacking.