Well here's the question- If given the chance, would you use it in a streetfight type situation? I know that some techniques such as the heel hooks are very unforgiving when applied to full extent, but I've personally seen and heard of many armbars that "popped" the arm (sometimes multiple pops) causing hyperextension, but never any permanent damage. In fact, some of guys that "pop" their arm are able to shrug off the pain and roll afterwards. The worst I've seen was in the Mir/Sylvia fight where Tim's arm was actually broken by Frank's armbar, but in the majority of the times, the fighter's arm is fine and mobile afterwards. The question I'm trying to get at is this: If applied in a street fight, would the arm bar (applied to it's fullest), immobilize your attacker's arm or would adrenaline overcome the damage done to the arm and make it somewhat of an ineffective move?