the instructor as well as the student are fully to blame. in the beginning of the video you can plainly hear the victim state and i quote "well i don't want to demonstrate on him, i will demonstrate around him". the victim then follows up this by saying "you can just stand here do not make any movement what so ever, i will not touch you". and lastly "do you feel threatened, i just wished to teach you, i do not wish to hurt you". the victim then starts demonstrating that you must watch the wands and the feet, and then the student comes forwards with assault. the student instigated the fight, the victim defended himself, the instructor allowed the incident to continue. where's the confusion? even after the victim verbally stated "stop, you are good" he continues to be assaulted. it has caught the eyes of mass media and investigations have been started from what i gather.

http://www.youtube.com/watch?v=wObjWdQBeA4

also, if the fight was over and they "drug" this guy outside why in the hell is there blood on the back door about head high? further assault off camera maybe?