I think many of these kung fu superstars are martial arts champions or have studied martial arts for many years. So their kung fu is very powerful.

I once read a news that Jet Li was provoked by foreigners when interviewed, and that Taiji Chuan was just flirting. Hot-blooded Jet Li immediately put his fist to good use, kicking the host's desk over with his two feet.

When Jackie Chan was interviewed by foreigners, the host danced in front of Jackie Chan and saw Jackie Chan kick the host handsomely.