Holy cow! Is that guy even holding that thing or is it just twirling around in midair. Yeah, it would not be too useful in a fight, but I will say that if you have that level od speed and coordination, if you were to use more realistic and practical techniques you could be very dangerous. Never look down on the showy forms. They may not be immediately practical, but they will give you the speed, cooridination, and sense of timing from one technique to the next.