You sure it isn't the ancient martial arts of Computer Generated Graphics and Stuntmen and Choreographed Fights that allows that?

Also, ANY history you hear about a martial art that sounds a bit far fetched tends to be far more than a bit far fetched. Not just saying that about Kung Fu, but a lot of the TMAs. Kinda like how the samurai somehow became these honor bound swordsmen sworn to a life of destitution to rid the evils from the world, when in reality they were rich horse archer noblemen.