Wait you mean i'm not supposed to just stand there statically in these 'stance' things?
Wow man, thanks for that big revelation, i'm glad you were here to teach me these secrets of Chinese IMA, because no way would I ever have learned such a simple commmon sense concept
from simply having good training.
An external kick is limited by biomechanics, an internally generated kick is not.
Uh..no. Unless you believe in being able to bend the laws of physics, both 'external' and 'internal' are both limited by biomechanics, and are just different methods are learning and progressing.
If you do believe you can alter the laws of phyics, more than likely you are just crazy!