My mum lives in Boston; she's famous for teaching wushu and t'ai chi. So from when I was young, my mum and aunt were like: 'You're training; you're not playing baseball or football.' Training every day was normal. Later, when I was almost a teenager, Bruce Lee became my idol.

In Hong Kong, particularly, we craft this art for decades. The action choreographer actually is the action director. He takes over and he choreographs with - by himself or with his team, and place the camera where he feels cinematic effect to bring out that choreography.

As an action director I always try to bring something fresh and new.

I try to update my arsenal constantly. Learning different martial arts since childhood. To understand what's out there. To really be in tune.

It takes years of building that experience as a filmmaker, as well as physically. You have to have a high level understanding of martial arts.

I've always been in a rebel.

I always used to wonder why American actors were getting fat, then I made a U.S. movie. I'm seeing all the food every day, and there's lots of waiting around because making an American movie is very slow.