Many times I see example of a self defense technique that involves some form of attack being countered as the student plaing the role of the attacker stands there waiting to be told what to do. The student is frozen in the moment with no instructions on what is expected of him and is easily defeated. In most cases the student is being manhandled by the instructor who is using both hands to deal with the attack while the student has one arm stuck out in the attack pose and one arm at his (or her) side.
When you see this stupidity always remember that you have two hands and two feet. If somone is foolish enough to put “two on one” and leave their head open then step in and give them a present.