Has Bruce Lee ever starred in a commercial? I don't think so. But the truth is 1996 on Japanese energy drink commercial, you can see him acting in the commercial showing his great martial arts. Then, you must think that it was done using computer technology.
If you have ever seen his movie "Way of the Dragon", and you ever noticed that his movements in the commercial, were actually used in the commercial. This was made possible using "super-imposition" technique. So, this means that Bruce Lee was not really acting for it, but was just put in the commercial.
It's still a nice commercial, though for those who still love Bruce Lee and his great movie, "Way of the Dragon".