Nick Cheung recently revealed that he had considered becoming a Muay Thai fighter once.
According to Nick, he had considered becoming a fighter several years before making UNBEATABLE.
He said that he had been very interested in fighting even then, and that he had studied Muay Thai for a year.
That was when he had considered fighting professionally once. However he did not follow through.
He said "As an artist I couldn't fight until my face was busted open and my arms and legs were broken."
Despite this, he pointed out that every man has a special feeling for fighting, deep in every man's DNA, which he felt strongly while making UNBEATABLE.