The exercise is to do a knee strike, left on one and right on two. The counting is hard and fast, alternating and keeping the student guessing. Today I stopped the drill halfway. After a little while most of the students would do the knee strike, and then put the knee down to prepare for the next knee strike. However, this meant that their baseline or 'ready' combat stance was different from when they were at the start line. The combat stance there was a truncated front stance with COG in the middle or slightly forward and therefore more of the weight was on the front leg. However with the kicking drill, preparing to kick again, the lazy way is to make sure the weight is shifted to the back leg so that the front leg can be swung up easier. But what does this tell the opponent? This tells the opponent you're not striking with the hands - you're striking with the legs. Specifically you're striking with the front leg. This is not what you want. You don't want to telegraph what you're doing, so you need to return to the 'prescribed' baseline combat stance before you have to do anymore shifting of your COG to cater towards the various techniques. This means you keep the opponent guessing as to whether you're punching with the hands or kicking with the feet. :-) Too easy.
Bruce Lee's Speed Training - Interesting last section on non-telegraphing of the punch (not that I totally agree with the brevity of how he has treated this subject)