You can check it out below, but be forewarned - it's gruesome, grapplers. In short, Aoki forces Hirota's arm into a very bad position (i.e., Hirota's arm behind his back) and then proceeds to snap it completely at what appeared to be the the humerus. After the fight is immediately stopped, he flips-off Hirota, whose arm was left dangling, and runs around giving everyone the bird and continues to taunt the downed opponent.
I'm not sure what we to say about this whole occurrence. On the one hand, it's a great display of grappling skill. At the same time, to me, it flies in the face of good grappling etiquette and sportsmanship, which to some extent tarnishes our sport. Either way, I think it's noteworthy for DSTRYRsg. WHAT DO YOU THINK, GRAPPLERS?
I had the pleasure of training with Aoki and a bunch of top Japanese pro MMA grapplers at Shibuya Scramble (Tokyo) back in 2005 (the so-called "Nippon Top Team") when I was a brown belt. I liked him and the others. They were all very respectful, but super competitive and very good.
Training with Aoki, and others (including Rumina Sato!) in Japan 2005.