it's also physically impossible. i posted a link in the kung fu forum to a wing chun site that kind of describes the science behind it. the shortest distance from one point to another is a straight line, so the chain punch can move faster. it worked so well for lee because he had foreamrs like popeye. in most cases, it is most likely not as powerful as a boxer/karateka's punch, but you can land about 3 in the time it would usually take to land 1.