I don't make comparisons between any movies. I compare characters. All my actions, performances, all my films, they are driven by the characteristic. If I'm playing a cop, then I give him a particular style - I may not know that style, but as an actor I have to be responsible to do your homework and do your research and training and stuff like that.

Like any other actor, I draw on life experience.

Look at every action movie in Hollywood. Every leading man from Spider-Man to Batman to James Bond, 'Bourne Identity', every one of them possesses martial arts skills.

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.

For years, I looked to Bruce Lee as a mentor as being a Chinese and Asian man living in this country.

Doing a movie is a stressful thing. You spend months of you life focusing into that one project, and I want to make sure I do something I really like or I'm really passionate about.

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.