This is one of the reasons that Rickson Gracie is considered the best. For those of you that don't know Rigan Machado, read about here: [ame]http://en.wikipedia.org/wiki/Rigan_Machado[/ame]. Rickson Gracie is supposedly the only person to ever defeat him. [ame]http://www.youtube.com/watch?v=t072yakg_kY[/ame]