Brazilian Jiu Jitsu is a martial art/combat sport with a goal to be in a dominant position to put your opponent in a joint lock position or in a choke hold so that he/she is forced to submit with a hand tap or gets “choked” out.  In this video demo Justin Brooks, owner of Austin Muay Thai & Jiu Jitsu and a purple belt in BJJ, demos a progression to obtain an arm bar.