Chasing Cars

Do I really look like a man with a plan, Harvey? I don't have a plan. [...] You know what I am, Harvey? I'm a dog chasing cars. I wouldn't know what to do if I caught one. I just *do* things. I'm a wrench in the gears. I *hate* plans. [...] I am not a schemer. I show schemers how pathetic their attempts to control things really are.

The joker
Batman: The dark Knight