demos like that would give novices alot of confidence that you can do alot of damage with Hapkido, which seems to be the priority of many people when assessing potential martial arts. I enjoyed the demo but I certainly hope those uke's (or whatever they're called in Korean) warmed up properly. That master looked like he hyperextended a few of those arm locks. However, I was uncomfortable with the severity of the demo when the uke was clearly compliant. Pain can be the objective of the art without you having to prove it against a compliant uke. Aiki-Jujutsu uses alot of pain compliance in its techniques but the objective is control not damage (though damage can be a real consequence).