The CQB blog of the KORA Research Group. You should investigate this thoroughly.
Wish I saw this when I was doing JKD. The left cross is something forced upon you if you go right side forward in classical style. I could not get power out the left cross and it used to wind me up no end.I remember being told to 'sit down' by someone who looked at my left cross. This tallys with this video.The keep moving idea, then is a counter for the defender, to this sinking, as they root they are less mobile ?! Or am I wrong ?