Ryan Hall deserves a lot of credit as well for his work with the 50/50. He openly acknowledges that he learned it from Brandon Vera, who learned it from Dean Lister. However he really did take it to another level. The entire approach Danaher took with his guys (focusing on leg locks when they first started in high level competitions because a lot of black belts weren't well versed in them) is what Ryan did earlier in his career. Ny his own admission, he was able to exploit the lack of leg lock knowledge of guys that were better than him and win matches that way.