"What the hell kind of man decides to dress up as a bat and run around the city? There's got to be something a little bit loose in there"

This quote by Christian Bale is referring to the character of Batman, a superhero that spruce up in a bat costume and fights criminal offense in the imaginary city of Gotham. The quote implies that there is something psychologically wrong with the personality of Batman, as it is not typical for someone to spruce up as a bat and also run around a city. Bundle is recommending that Batman is a little crazy, which his decision to become a vigilante suggests mental instability. The quote additionally implies that Batman is an intricate personality, as his inspirations for becoming a superhero are not totally clear. Bundle's quote suggests that Batman is a mysterious number, and that there is something one-of-a-kind as well as special about him that establishes him besides other superheroes.