Rickson and Helio Gracie sharing knowledge and wisdom on Brazilian Jiu Jitsu, or BJJ. Helio being a smaller fighter preferred this fighting style. It is possible to take on much larger and stronger opponents, because this technique primary uses holds to force submission. Rickson also took to BJJ for the same reasons.
When Rickson first started fighting he was matched with a fighter called Zulu, a much larger fighter. After winning the match he was inspired and began training full time. He now goes to competitions in Japan were he fights opponents that use other fighting styles. By beating them using BJJ he proves that it is a very effective style.