i think he lost the alignment in his knee area...
but seriously- i have heard or read the yi quan people say that issuing power should be like a dog shaking water
currious to hear more about this...
i learned a pole shaking exercise in taiji that develops the kind of power that the dog is showing in the video
but that is only one type
in taiji (the way i learned) the issuing is like an explosion- everything expanding as the weight is dropped...
this type seems to be what i see in a lot of the yi quan fali demo clips online
my understanding si the shaking power is to effect the opponents body and then use issuing...
curious to other people's thoughts...
franklin