With more than two decades of experience as a martial artist, Tony Jaa clearly has advantage in executing the Bottle Cap Challenge. Still, the reality is not always as smooth as the theory. The Thai actor/stuntman accidentally kicked his friend, who was holding the bottle, so hard in the face that he was knocked down, though the friend didn't seem to be seriously injured. Trying to redeem the mishap, he then uploaded two more videos showing him unscrewing a bottle cap with his knee and elbow.
