You have to always try to think about them like real people first, and not just heroes. They have to be real characters. As people do more and more superhero stuff, the characters are what distinguish it, just like in cop shows.
When Joseph Wambaugh writes about the LAPD, you listen because you know he knows the scene. Lots of people write cop novels, but they don't have that authenticity.
I was an infantry Marine, and there are only so many things you can do when you get out of the military that you can apply your job to. Either a janitor or a cop. I tried to do both of those things because what else are you going to do?
When I was 13, Eddie Murphy was to me what Chris Tucker was to 13-year-olds when I made 'Rush Hour.' And 'Rush Hour' really came out of the fact that I grew up watching 'Beverly Hills Cop' and '48 Hrs.'