When Hélio Gracie's arm was broken by Masahiko Kimura in 1951, it was with a submission he had never seen. Hélio's reaction epitomized Brazilian Jiu Jitsu; he began studying the armlock used to defeat him and soon it was added to his toolkit. From that day forward the Kimura submission has been a part of Brazilian Jiu Jitsu. Nowadays the Kimura is used from many different positions to submit and control opponents. A testament to the technique, after all these years the basic mechanics remain the same.