Back Spin Knee Bar Entry To Forward Roll Back Attack

Every now and then when we are searching the internet to bring you the coolest and newest fighting techniques we find a  entry that make us say to ourselves, "Why didn't we think of that?".  This entry to the back is one such technique, check it out and let us know what you think. We are sorry, but unless you speak Portuguese, you'll have to just watch the technique without understanding the audio.