Video of Aoki using a traditional jiujitsu move to break an arm.

http://www.youtube.com/watch?v=Q_718dOW09k

2 minutes in Aoki uses a short shia-nage to break dudes arm

Actually thats waki-gatame, a very common Judo arm lock. (Shinya was a Judo Guy before doing BJJ)

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

http://www.youtube.com/watch?v=KwM7fAqN6f0

Thanks for the vid i wasnt even aware its was a lock in judo judos roots do come from jiujitsu is that even legal in mma its such a quick break.

Yesir.