1) why pak if your partner doesn't feed you the energy to do so? (ok, I get it, its a skill learning drill...so lets move on)
Right, as JPinAZ said, there was no mention of why and when. But even if he got that part right, his timing was still off. So, we look at that...
2) why roll down from bong to tan before launching the punch?
Precisely because his timing was wrong.
It's a bad idea to start a punch from that
bong position. The hand is near the partner's opposite shoulder and the elbow high. The elbow follows a quarter-circle to get back into alignment for the punch, which is a huge movement easily detected by the partner, even by sight, if initiated from
bong, giving them all kinds of reaction time, so any response could shut it down before the punch even gets into alignment.
Both of his timings were punching off the
bong; one at the apex of the motion during the roll (reversing the path) and one when the action stops, giving the partner even more physical and mental preparation. Both wrong for these reasons. There is no reason this should not be shut down every single time.
Video 1:
- IMHO - As his high fook sao is coming down to the low fook sao position...and as his tan is pressing upwards/forwards towards his partners face...that (if you were to do this "drill") would seem to be a little better scenario. So his left hand would have more of a Jum punch energy...while his right hand would have more of a tan / rising punch energy.
Exactly. That is one good timing, because the right punching arm will already be in alignment ready to shoot forward when released. The partner's arms will also be almost parallel and he will be mid-action, physically and mentally.
The second timing would be coming down from
bong as your hand is pointed at their face and your elbow in good punching alignment. In these two timings, your hand will literally be inches from their face, so when it shoots forward (may use palm for safety), there will be very little time for it to be detected and shut down.
One of the main reasons for
chi-sau drilling is to develop usable fighting attributes like timing, speed, reaction time, and appropriate response. It's a mutual development drill. If you use the wrong timing, you are doing a disservice to your partner who is not under much pressure. If your timing is correct, your partner must react fast with an appropriate response or be hit. So, this drill should be used to improve their reaction time and response just as much as your timing and speed. As done in these clips, neither partner is improving anything useful for fighting, only technique vs technique ideas with
chi-sau.