Self Defense

Should self defense demonstrations be flashy or practical?

I have done them, and i have witnessed thousands of them, and that is self defense demonstrations. Yes, over the years i have seen instructors from just about any martial art background you can imagine, performing a self defense demo.
But there is one problem….no scientific approach. No, in fact, many of them take the approach of Hollywood, or a gymnastics one, with no real emphasis on what the individual needs from a practical self defense stand point. You must remember, we are all different, and come with different weaknesses, injuries, personalities etc., and this is where many instructors drop the ball.