I was just thinking about this show earlier today. Sometimes, I think about random things in a Wikipedia-article style (YKYLWTMW*), and Kung Fu came into my head: the overall premise, the "snatch the pebble from my hand" thing, and the scene at the end of every episode, where Caine would grab the cauldron of hot coals using his forearms. I haven't seen the show in decades, but there was an updated version of it in the 90s. Set in the present day, Carradine plays the great-grandson of the original Caine. In this show, Caine has a son who is a big-city cop (it was made in Canada, so the city is Toronto pretending to be an unnamed U.S. city). The shows does the same flashback thing as the original, but this time Caine is trying to instruct his son, Peter, about the Shaolin way. They get separated for some twenty years, but are reunited and fight crime together. Of course, this show suffers from the same problem most updated shows have: it sucked. I don't know if it was on TV where you're from, but the reruns can still be seen on cable here in Canada.
(*-You Know You Like Wikipedia Too Much When...)