'Actually a lot of people think I have mental problems anyway. Maybe I am just playing myself. As an actor we often get killed, and we get back up and get killed again. I think I have died many times already. I love action movies and I remember my action debut was in Gen-X Cops directed by Benny Chan Muk-sing, so if he ever asks me to be in his movies, I would never say no. Ultimately, I do want to be a well-rounded film director, but I still have a lot to learn. Opportunities are rare so I want to be ready for any that come and not miss any chance.' Actor Sam Lee Chan-sum (left), who appears in Chan's new film Invisible Target, on always playing crazy characters or villains.